Details of the Researcher

PHOTO

Masahiro Terada
Section
Graduate School of Science
Job title
Professor
Degree
  • 博士(工学)(東京工業大学)

  • 工学修士(東京工業大学)

Researcher ID

Research History 4

  • 2006/04 - Present
    Tohoku University

  • 2001/07 - 2006/03
    東北大学 大学院理学研究科 助教授

  • 1989/04 - 2001/06
    東京工業大学 大学院理工学研究科 助手

  • 1999/09 - 2000/08
    Harvard University Chemstry and Chemical Biology Post Doctoral Researcher

Education 2

  • Tokyo Institute of Technology Graduate School, Division of Science and Engineering 化学工学専攻

    - 1989/03/31

  • Tokyo Institute of Technology Faculty of Engineering 化学工学科

    - 1986/03/26

Professional Memberships 6

  • 日本薬学会

    2015/04 - Present

  • 日本プロセス化学会

    2013/04 - Present

  • 近畿化学協会

  • アメリカ化学会

  • 日本化学会

  • 有機合成化学協会

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Research Interests 30

  • 不斉合成

  • 触媒

  • 不斉触媒

  • 分子認識

  • 水素結合

  • 分子変換

  • 環境調和

  • 金属錯体

  • 有機分子触媒

  • グアニジン

  • アルドール反応

  • チタン錯体

  • エン反応

  • Diels-Alder反応

  • 配位子

  • 分子設計

  • 非対称化

  • 物質変換

  • 光学活性

  • ルイス酸

  • 触媒反応

  • ブレンステッド酸

  • 環境

  • 酸化

  • 環境調和型

  • ものづくり

  • アントラサイクリン

  • 有機カチオン

  • 硫黄

  • 選択的合成

Research Areas 1

  • Nanotechnology/Materials / Synthetic organic chemistry /

Awards 17

  1. Lectureship Award from Southern University of Science and Technology

    2019/10 Southern University of Science and Technology Recent Progress on Chiral Brønsted Acid Catalysis

  2. Pharmaron Lectureship Award

    2019/10 Pharmaron Recent Progress on Chiral Brønsted Base Catalysis

  3. The Synthetic Organic Chemistry Award, Japan

    2018/02 Synthetic Organic Chemistry Japan

  4. Molecular Chirality Award 2015

    2015/06 Organizing Committee of Molecular Chirality Enantioselective Catalysis by Chiral Brønsted Acids & Chiral Brønsted Bases

  5. ACP Lectureship Award 2013, Thailand

    2013/11 The coordinator of Asia Core Program, Thailand Chiral Phosphoric Acids as Versatile Catalysts for Enantioselective Transformations

  6. ACP Lectureship Award 2013, Taiwan

    2013/11 The coordinator of Asia Core Program, Taiwan Chiral Phosphoric Acids as Versatile Catalysts for Enantioselective Transformations

  7. ACP Lectureship Award 2012, Singapore

    2012/12 The coordinator of Asia Core Program, Singapore Enantioselective Catalysis by Chiral Brønsted Acids and Bases

  8. ACP Lectureship Award 2012, Korea

    2012/12 The coordinator of Asia Core Program, Korea Chiral Phosphoric Acids as Versatile Catalysts for Enantioselective Transformations

  9. Nagoya Silver Medal

    2012/11

  10. 企業冠賞 第一三共・創薬有機化学賞

    2012/02 有機合成化学協会 水素結合を戦略的相互作用とする有機分子触媒の創製

  11. ACP Lectureship Award 2010, China

    2010/11/10 The coordinator of Asia Core Program, China Binaphthol-derived phosphoric Acid as a Versatile Catalyst for Enantioselective Carbon-Carbon Bond Forming Reactions

  12. ACP Lectureship Award 2010, Hong Kong

    2010/11 The coordinator of Asia Core Program, Hong Kong Binaphthol-derived phosphoric Acid as a Versatile Catalyst for Enantioselective Carbon-Carbon Bond Forming Reactions

  13. Mukaiyama Award

    2010/09/02 有機合成化学協会

  14. 日本化学会 学術賞

    2009/03/28 日本化学会 水素結合を鍵相互作用として有する有機分子触媒の創製

  15. 有機合成化学奨励賞

    2004/02/18 社団法人 有機合成化学協会 不斉金属錯体を触媒とする高エナンチオ選択的カルボニル-エン反応の開発

  16. 井上研究奨励賞

    1995/11 財団法人 井上科学振興財団 ランタニドおよびチタン錯体を用いる炭素―炭素結合生成反応の不斉触媒化に関する研究

  17. 手島研究論文賞

    1994/05 財団法人 理工学振興会 ランタニドおよびチタン錯体を用いる炭素―炭素結合生成反応の不斉触媒化に関する研究

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Papers 274

  1. Synthesis of 2,3,5,6‐Tetrasubstituted Thieno[3,2‐b]furans through Formal [3+2] Cycloaddition Utilizing [1,2]‐Phospha‐Brook Rearrangement/Brønsted Base‐Mediated Cyclization Sequence Peer-reviewed

    Azusa Kondoh, Kohei Aita, Masahiro Terada

    Advanced Synthesis & Catalysis 2024/11/19

    DOI: 10.1002/adsc.202400767  

  2. Asymmetric Auto-Tandem Catalysis with Chiral Organosuperbases: Intramolecular Cyclization/Enantioselective Direct Mannich-Type Addition Sequence Peer-reviewed

    Azusa Kondoh, Takuro Kato, Hao Chen, Masahiro Terada

    Organic Letters 2024/08/02

    DOI: 10.1021/acs.orglett.4c02532  

  3. Catalytic Generation and Intermolecular Addition of Diarylmethyl Anions Utilizing [1,2]‐Phospha‐Brook Rearrangement Under Brønsted Base Catalysis

    Azusa Kondoh, Masahiro Terada

    Advanced Synthesis & Catalysis 366 (8) 1857-1862 2024/03/05

    Publisher: Wiley

    DOI: 10.1002/adsc.202301503  

    ISSN: 1615-4150

    eISSN: 1615-4169

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    Abstract An intermolecular addition reaction involving an unconventional combination of a diarylmethyl anion and an electrophile, which is mediated by the [1,2]‐phospha‐Brook rearrangement under Brønsted base catalysis, was developed. Diarylmethyl anions having a benzofuran moiety were generated through the rearrangement with the aid of a catalytic amount of phosphazene base P2‐tBu. The resulting carbanion intermediates were trapped by various electrophiles, such as α,β‐unsaturated ketones, aryl aldehydes, α‐ketoesters, and N‐Boc imines, providing the corresponding diarylalkane derivatives in good yields.

  4. Construction of 1,3‐Nonadjacent Stereogenic Centers Through Enantioselective Addition of α‐Thioacetamides to α‐Substituted Vinyl Sulfones Catalyzed by Chiral Strong Brønsted Base Peer-reviewed

    Azusa Kondoh, Rihaku Ojima, Sho Ishikawa, Masahiro Terada

    Advanced Science 2024/03

    DOI: 10.1002/advs.202308020  

  5. DFT calculation-aided optimisation of a chiral phosphoric acid catalyst: case study of kinetic resolution of racemic secondary alcohols through lactonisation

    Haiting Ye, Takuma Sato, Taishi Nakanishi, Shigetomo Ito, Shigenobu Umemiya, Masahiro Terada

    Catalysis Science & Technology 2024

    Publisher: Royal Society of Chemistry (RSC)

    DOI: 10.1039/d4cy01029a  

    ISSN: 2044-4753

    eISSN: 2044-4761

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    Chiral phosphoric acid catalysts were screened rationally and efficiently through the theoretical prediction model of the kinetic resolution of racemic γ-hydroxybutyrate without performing an exhaustive search for plausible lactonisation pathways.

  6. Synthesis of Structurally Diverse Polycyclic Arenes Using Tandem Oxidative Ring Expansion Strategy

    Tienan Jin, Masahiro Terada

    Journal of Synthetic Organic Chemistry, Japan 81 (11) 1062-1072 2023/11/01

    Publisher: The Society of Synthetic Organic Chemistry, Japan

    DOI: 10.5059/yukigoseikyokaishi.81.1062  

    ISSN: 0037-9980

    eISSN: 1883-6526

  7. Silver‐Catalyzed para‐Selective Sulfenyl Group Transfer Reactions of N‐Sulfenylanilides

    Itaru Nakamura, Ichiro Muranushi, Takato Asoh, Masahiro Terada

    Chemistry – A European Journal 29 (53) 2023/08/21

    Publisher: Wiley

    DOI: 10.1002/chem.202301751  

    ISSN: 0947-6539

    eISSN: 1521-3765

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    Abstract Silver‐catalyzed reactions of N‐sulfenylanilides afforded the corresponding p‐sulfenylanilides in good to high yields with good para selectivity. The transformation has a high compatibility of functional groups, such as ester, bromo, and iodo groups. Mechanistic studies indicate that the rearrangement reaction proceeds through intermolecular transfer of the sulfenyl group.

  8. Brønsted Base-Catalyzed Reductive Deimination of α-Iminoketones

    Azusa Kondoh, Seitaro Inoue, Rihaku Ojima, Masahiro Terada

    Bulletin of the Chemical Society of Japan 96 (9) 849-851 2023/07/25

    Publisher: Oxford University Press (OUP)

    DOI: 10.1246/bcsj.20230125  

    ISSN: 0009-2673

    eISSN: 1348-0634

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    Abstract An unprecedented reductive deimination of α-iminoketones derived from benzils was developed under Brønsted base catalysis. Treatment of α-iminoketones with silanethiols in the presence of a catalytic amount of P2-tBu provided the corresponding arylbenzylketones in good yields. This is a rare example of the direct transformation of an imine moiety into a methylene moiety.

  9. Organocatalytic Atroposelective Construction of Axially Chiral Compounds Containing Benzimidazole and Quinoline Rings

    Linan Hou, Sheng Zhang, Ji Ma, Haiyu Wang, Tienan Jin, Masahiro Terada, Ming Bao

    Organic Letters 25 (29) 5481-5485 2023/07/20

    Publisher: American Chemical Society (ACS)

    DOI: 10.1021/acs.orglett.3c01905  

    ISSN: 1523-7060

    eISSN: 1523-7052

  10. Formal Addition of β‐Acylalkenyl Anions to Ketones Utilizing [1,2]‐Phospha‐Brook Rearrangement under Brønsted Base Catalysis Peer-reviewed

    Azusa Kondoh, Sena Takada, Kohei Aita, Masahiro Terada

    European Journal of Organic Chemistry 2023/07/03

    DOI: 10.1002/ejoc.202300425  

  11. Synthesis of Curved Polycyclic Arenes Embedded with Oxepine and Thiepine Using Ring Expansion Strategy

    Sheng Zhang, Hidenori Matsuyama, Itaru Nakamura, Masahiro Terada, Tienan Jin

    Organic Letters 25 (27) 5027-5032 2023/07/03

    Publisher: American Chemical Society (ACS)

    DOI: 10.1021/acs.orglett.3c01730  

    ISSN: 1523-7060

    eISSN: 1523-7052

  12. Synthesis of meta-Aminophenol Derivatives via Cu-Catalyzed [1,3]-Rearrangement—Oxa-Michael Addition Cascade Reactions

    Itaru Nakamura, Mai Tachibana, Riku Konta, Hiroki Tashiro, Masahiro Terada

    Molecules 28 (10) 4251-4251 2023/05/22

    Publisher: MDPI AG

    DOI: 10.3390/molecules28104251  

    eISSN: 1420-3049

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    Cu-catalyzed reactions of N-alkoxy-2-methylanilines and alcohols in the presence of catalytic amounts of IPrCuBr and AgSbF6 afforded the corresponding meta-aminophenol derivatives in good to high yields. These reactions proceed via a [1,3]-rearrangement, in which the alkoxy group migrates from the nitrogen atom to the methyl-substituted ortho position, followed by an oxa-Michael reaction of the resulting ortho-quinol imine intermediate.

  13. Scalable Total Synthesis of Leucascandrolide A Macrolactone Using a Chiral Phosphoric Acid/CuX Combined Catalytic System

    Shigenobu Umemiya, Naoya Shinagawa, Masahiro Terada

    Organic Letters 2023/03/24

    DOI: 10.1021/acs.orglett.3c00450  

  14. Synthesis of Polysubstituted Naphthofurans and Indenofurans Based on a Regiodivergent Intramolecular Carbometalation Strategy with 2‐(2’‐Alkynylaryl)‐3‐iodofurans

    Azusa Kondoh, Kohei Aita, Masahiro Terada

    Chemistry – A European Journal 2023/03/17

    DOI: 10.1002/chem.202300132  

  15. [1,2]‐Phospha‐Brook Rearrangement as Tool for Generation of Anionic Nucleophiles in Addition Reactions under Brønsted Base Catalysis

    Azusa Kondoh, Masahiro Terada

    Asian Journal of Organic Chemistry 2023/03

    DOI: 10.1002/ajoc.202300003  

  16. Construction of Alkylidene Fluorene Scaffolds Using Pd-Catalyzed Direct Arene/Alkene Coupling Strategy

    Hidenori Matsuyama, Xuan Zhang, Masahiro Terada, Tienan Jin

    Organic Letters 2023/02/10

    DOI: 10.1021/acs.orglett.2c04307  

  17. Intermolecular exo-selective Diels–Alder reaction catalysed by dual-functional Brønsted acid: conformational restriction of transition states by hydrogen bonds as the key interaction

    Taishi Nakanishi, Masahiro Terada

    RSC Advances 13 (51) 36293-36300 2023

    Publisher: Royal Society of Chemistry (RSC)

    DOI: 10.1039/d3ra07688a  

    eISSN: 2046-2069

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    An exo-selective Diels–Alder reaction was predicted by a computational approach and was experimentally confirmed by the combined use of a dual-functional acid catalyst, such as phosphoric acid, and the conformationally restricted dienylcarbamate.

  18. Copper-catalyzed [1,3]-nitrogen rearrangement of O-aryl ketoximes via oxidative addition of N–O bond in inverse electron flow

    Mao Suzuki, Masahiro Terada, Itaru Nakamura

    Chemical Science 14 (21) 5705-5711 2023

    Publisher: Royal Society of Chemistry (RSC)

    DOI: 10.1039/d3sc00874f  

    ISSN: 2041-6520

    eISSN: 2041-6539

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    [1,3]-Nitrogen rearrangement reactions of O-aryl ketoximes was catalytically promoted by IPrCuBr and BF3·OEt2. The oxidative addition of the N–O bond to the Cu catalyst is accelerated by donation of electrons from both nitrogen and oxygen atoms.

  19. Computational Molecular Refinement to Enhance Enantioselectivity by Reinforcing Hydrogen Bonding Interactions in Major Reaction Pathway

    Taishi Nakanishi, Masahiro Terada

    Chemical Science 2023

    Publisher: Royal Society of Chemistry (RSC)

    DOI: 10.1039/d3sc01637d  

    ISSN: 2041-6520

    eISSN: 2041-6539

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    Computational analyses have revealed that the distortion of the catalyst and the substrates and their interactions are key to determining the stability of the transition state. Hence, two strategies “distortion...

  20. Enantioselective direct Michael addition of cyanohydrin ether derivatives to enones catalyzed by chiral bis(guanidino)iminophosphorane organosuperbase

    Saikat Das, Azusa Kondoh, Masahiro Terada

    Chemical Science 2023

    DOI: 10.1039/D2SC07065K  

  21. Gold-Catalyzed Intermolecular Alkyne Insertion into the N–S Bond in Sulfenamides

    Takato Asoh, Hiroki Tashiro, Masahiro Terada, Itaru Nakamura

    Organic Letters 24 (50) 9264-9268 2022/12/23

    Publisher: American Chemical Society (ACS)

    DOI: 10.1021/acs.orglett.2c03831  

    ISSN: 1523-7060

    eISSN: 1523-7052

  22. Iridium-Catalyzed Double Asymmetric Hydrogenation of 2,5-Dialkylienecyclopentanones for the Synthesis of Chiral Cyclopentanones

    Yu Nie, Qianjia Yuan, Feng Gao, Masahiro Terada, Wanbin Zhang

    Organic Letters 2022/11/04

    DOI: 10.1021/acs.orglett.2c02656  

  23. Brønsted Base Catalyzed Conjugate Addition of β-Acylvinyl Anion Equivalents to α,β-Unsaturated Ketones

    Azusa Kondoh, Masahiro Terada, Sho Yamaguchi, Yushi Watanabe

    Synlett 2022/11

    DOI: 10.1055/a-1827-5652  

  24. Synthesis of 2,2‐Disubstituted 2 H ‐Chromenes through Carbon‐Carbon Bond Formation Utilizing a [1,2]‐Phospha‐Brook Rearrangement under Brønsted Base Catalysis

    Azusa Kondoh, Masahiro Terada

    Chemistry – A European Journal 2022/08/10

    DOI: 10.1002/chem.202201198  

  25. Formal Umpolung Addition of Phosphites to 2‐Azaaryl Ketones under Chiral Brønsted Base Catalysis: Enantioselective Protonation Utilizing [1,2]‐Phospha‐Brook Rearrangement

    Azusa Kondoh, Takayuki Hirozane, Masahiro Terada

    Chemistry – A European Journal 2022/07/26

    DOI: 10.1002/chem.202201240  

  26. Gold-Catalyzed Skeletal Rearrangement Reactions of O-Propargylic and O-Homopropargylic Oximes

    Itaru Nakamura, Masahiro Terada

    HETEROCYCLES 104 (9) 1535-1535 2022

    Publisher: The Japan Institute of Heterocyclic Chemistry

    DOI: 10.3987/rev-22-984  

    ISSN: 0385-5414

  27. Brønsted base-catalyzed 1,2-addition/[1,2]-phospha-Brook rearrangement sequence providing functionalized phosphonates

    Azusa Kondoh, Masahiro Terada

    Organic & Biomolecular Chemistry 20 (14) 2863-2866 2022

    Publisher: Royal Society of Chemistry ({RSC})

    DOI: 10.1039/D2OB00256F  

  28. Kinetic Resolution of Racemic Tertiary Allylic Alcohols through SN2’ Reaction Using a Chiral Bisphosphoric Acid/Silver(I) Salt Co-catalyst System

    Satavisha Kayal, jun kikuchi, Naoya Shinagawa, Umemiya Shigenobu, Masahiro Terada

    Chemical Science 2022

    Publisher: Royal Society of Chemistry (RSC)

    DOI: 10.1039/d2sc03052g  

    ISSN: 2041-6520

    eISSN: 2041-6539

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    A highly efficient kinetic resolution (KR) of racemic tertiary allylic alcohols was achieved through an intramolecular allylic substitution reaction using a co-catalyst system composed of chiral bisphosphoric acid and silver...

  29. Chiral Organosuperbase Catalysts as Useful Tools for Developing Enantioselective Reactions

    Azusa Kondoh, Masahiro Terada

    ALDRICHIMICA ACTA 55 (1) 9-15 2022

    ISSN: 0002-5100

  30. Pd-Catalyzed Indolization/peri-C–H Annulation/N-Dealkylation Cascade to Cyclopenta-Fused Acenaphtho[1,2-b]indole Scaffold

    Tienan Jin, Shin Suzuki, Hon Eong Ho, Hidenori Matsuyama, Masaki Kawata, Masahiro Terada

    Organic Letters 23 (24) 9431-9435 2021/12/17

    Publisher: American Chemical Society (ACS)

    DOI: 10.1021/acs.orglett.1c03575  

    ISSN: 1523-7060

    eISSN: 1523-7052

  31. Formal Fluorinative Ring Opening of 2-Benzoylpyrrolidines Utilizing [1,2]-Phospha-Brook Rearrangement for Synthesis of 2-Aryl-3-fluoropiperidines

    Azusa Kondoh, Rihaku Ojima, Masahiro Terada

    Organic Letters 23 (20) 7894-7899 2021/10/15

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.1c02907  

  32. Development of chiral bisphosphoric acid/Boronic acid Co-catalyst system for enantioselective SN2’ reaction

    Satavisha Kayal, Jun Kikuchi, Naoya Shinagawa, Shigenobu Umemiya, Masahiro Terada

    Tetrahedron 132412-132412 2021/09

    Publisher: Elsevier BV

    DOI: 10.1016/j.tet.2021.132412  

    ISSN: 0040-4020

  33. Correction to “Chiral Brønsted Acid-Catalyzed Formal α-Vinylation of Cyclopentanones for the Enantioselective Construction of Quaternary Carbon Centers”

    Satavisha Kayal, Jun Kikuchi, Masahiro Shimizu, Naoya Shinagawa, Shigenobu Umemiya, Masahiro Terada

    ACS Catalysis 11 (14) 8956-8957 2021/07/16

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acscatal.1c02714  

  34. Consecutive O−S/N−S Bond Cleavage in Gold-Catalyzed Rearrangement Reactions of Alkynyl N-Sulfinylimines International-journal

    Hiroki Tashiro, Masahiro Terada, Itaru Nakamura

    Angewandte Chemie - International Edition 60 (22) 12248-12252 2021/05/25

    DOI: 10.1002/anie.202100207  

    ISSN: 1433-7851

    eISSN: 1521-3773

  35. Catalytic Enantioselective Allylation of Acetylenic Aldehydes by Chiral Phosphoric Acid/Transition Metal Cooperative Catalysis: Formal Synthesis of Fostriecin International-journal

    Shigenobu Umemiya, Masahiro Terada

    Organic Letters 23 (9) 3767-3771 2021/05/07

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.1c01166  

    ISSN: 1523-7060

    eISSN: 1523-7052

  36. Enantioselective Protonation: Hydrophosphinylation of 1,1-Vinyl Azaheterocycle N-Oxides Catalyzed by Chiral Bis(guanidino)iminophosphorane Organosuperbase International-journal

    Saikat Das, Qiupeng Hu, Azusa Kondoh, Masahiro Terada

    Angewandte Chemie - International Edition 60 (3) 1417-1422 2021/01/18

    Publisher: Wiley

    DOI: 10.1002/anie.202012492  

    ISSN: 1433-7851

    eISSN: 1521-3773

  37. Enantioselective Protonation: Hydrophosphinylation of 1,1‐Vinyl Azaheterocycle N ‐Oxides Catalyzed by Chiral Bis(guanidino)iminophosphorane Organosuperbase

    Saikat Das, Qiupeng Hu, Azusa Kondoh, Masahiro Terada

    Angewandte Chemie 133 (3) 1437-1442 2021/01/18

    Publisher: Wiley

    DOI: 10.1002/ange.202012492  

  38. Brønsted Base-Catalyzed Formal Reductive [3+2] Annulation of 4,4,4-Trifluorocrotonate and α-Iminoketones International-journal

    Azusa Kondoh, Masahiro Terada

    Chemistry - A European Journal 27 (2) 585-588 2021/01/07

    Publisher: Wiley

    DOI: 10.1002/chem.202002943  

    ISSN: 0947-6539

    eISSN: 1521-3765

  39. Copper-catalyzed [1,3]-alkoxy rearrangement for the selective synthesis of polycyclic ortho-aminoarenol derivatives

    Itaru Nakamura, Satoru Nozawa, Yasuhiro Ishida, Ichiro Muranushi, Alexandra Mayerweg, Masahiro Terada

    Organic Chemistry Frontiers 8 (22) 6390-6394 2021

    Publisher: Royal Society of Chemistry ({RSC})

    DOI: 10.1039/D1QO01189H  

    eISSN: 2052-4129

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    Copper-catalyzed [1,3]-alkoxy rearrangement reactions of polycyclic arenes and heteroarenes, such as naphthalenes, phenanthrenes, and indoles, afforded the corresponding ortho-aminoarenol derivatives in good yields and in a site-selective manner.

  40. Dynamic parallel kinetic resolution of α-ferrocenyl cation initiated by chiral Brønsted acid catalyst Peer-reviewed

    Yasunori Toda, Toshinobu Korenaga, Ren Obayashi, Jun Kikuchi, Masahiro Terada

    Chemical Science 12 10306-10312 2021

    Publisher: Royal Society of Chemistry ({RSC})

    DOI: 10.1039/D1SC02122B  

  41. Radical addition reaction between chromenols and toluene derivatives initiated by Brønsted acid catalyst under light irradiation

    Jun Kikuchi, Shota Kodama, Masahiro Terada

    Organic Chemistry Frontiers 2021

    Publisher: Royal Society of Chemistry ({RSC})

    DOI: 10.1039/D1QO00657F  

  42. Cu-Catalyzed [1,3]-Alkoxy Rearrangement/Diels-Alder Cascade Reactions via in Situ Generation of Functionalized ortho-Quinol Imines International-journal

    Itaru Nakamura, Kazuki Masukawa, Yasuhiro Ishida, Masahiro Terada

    Organic Letters 23 (11) 4127-4132 2021

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.1c00995  

    ISSN: 1523-7060

    eISSN: 1523-7052

  43. Exo-Cyclization: Intermolecular Methylene Transfer Sequence in Au-Catalyzed Reactions of O-Homopropargylic Oximes International-journal

    Itaru Nakamura, Arinobu Hirayama, Shinya Gima, Masahiro Terada

    Chemistry - A European Journal 26 (68) 15816-15820 2020/12/04

    DOI: 10.1002/chem.202002764  

    ISSN: 0947-6539

    eISSN: 1521-3765

  44. Intermolecular oxidative Friedel-Crafts reaction triggered ring expansion affording 9,10-diarylphenanthrenes International-journal

    Tienan Jin, Lu Yang, Ilya D. Gridnev, Masahiro Terada

    Organic Letters 22 (22) 8920-8924 2020/11/20

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.0c03283  

    ISSN: 1523-7060

    eISSN: 1523-7052

  45. Chiral phosphoric acid-catalyzed enantioselective phospha-michael-type addition reaction of diarylphosphine oxides with alkenyl benzimidazoles International-journal

    Linan Hou, Jun Kikuchi, Haiting Ye, Ming Bao, Masahiro Terada

    Journal of Organic Chemistry 85 (22) 14802-14809 2020/11/20

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.joc.0c01840  

    ISSN: 0022-3263

    eISSN: 1520-6904

  46. Chiral phosphoric acid catalyzed enantioselective [4 + 2] cycloaddition reaction of α-fluorostyrenes with imines International-journal

    Masahiro Terada, Jun Kikuchi, Haiting Ye

    Organic Letters 22 (22) 8957-8961 2020/11/20

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.0c03360  

    ISSN: 1523-7060

    eISSN: 1523-7052

  47. Efficient Synthesis of O - Tert -Propargylic Oximes via Nicholas Reaction

    Itaru Nakamura, Keigo Shiga, Mao Suzuki, Masahiro Terada

    Synthesis (Germany) 52 (22) 3461-3465 2020/11/17

    DOI: 10.1055/s-0040-1707191  

    ISSN: 0039-7881

    eISSN: 1437-210X

  48. Enantioselective hydrophosphinylation of 1-alkenylphosphine oxides catalyzed by chiral strong Brønsted base International-journal

    Azusa Kondoh, Sho Ishikawa, Masahiro Terada

    Organic and Biomolecular Chemistry 18 (39) 7814-7817 2020/10/21

    Publisher: Royal Society of Chemistry ({RSC})

    DOI: 10.1039/d0ob01778g  

    ISSN: 1477-0520

  49. Synthesis of diarylalkanes through an intramolecular/intermolecular addition sequence by auto-tandem catalysis with strong Brønsted base International-journal

    Azusa Kondoh, Chaoyan Ma, Masahiro Terada

    Chemical Communications 56 (74) 10894-10897 2020/09/21

    DOI: 10.1039/d0cc04512h  

    ISSN: 1359-7345

    eISSN: 1364-548X

  50. Chiral Brønsted Acid Catalyzed Enantioconvergent Propargylic Substitution Reaction of Racemic Secondary Propargylic Alcohols with Thiols International-journal

    Jun Kikuchi, Kyohei Takano, Yusuke Ota, Shigenobu Umemiya, Masahiro Terada

    Chemistry - A European Journal 26 (49) 11124-11128 2020/09/01

    Publisher: Wiley

    DOI: 10.1002/chem.202001609  

    ISSN: 0947-6539

    eISSN: 1521-3765

  51. Tandem Oxidative Ring Expansion for Synthesis of Dibenzocyclooctaphenanthrenes International-journal

    Lu Yang, Hidenori Matsuyama, Sheng Zhang, Masahiro Terada, Tienan Jin

    Organic Letters 22 (13) 5121-5125 2020/07/02

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.0c01725  

    ISSN: 1523-7060

    eISSN: 1523-7052

  52. One-Pot Synthesis of Enantioenriched β-Amino Secondary Amides via an Enantioselective [4+2] Cycloaddition Reaction of Vinyl Azides with N-Acyl Imines Catalyzed by a Chiral Brønsted Acid International-journal

    Taishi Nakanishi, Jun Kikuchi, Atsushi Kaga, Shunsuke Chiba, Masahiro Terada

    Chemistry - A European Journal 26 (37) 8230-8234 2020/07/02

    Publisher: Wiley

    DOI: 10.1002/chem.202002049  

    ISSN: 0947-6539

    eISSN: 1521-3765

  53. Brønsted Base-Catalyzed Transformation of α,β-Epoxyketones Utilizing [1,2]-Phospha-Brook Rearrangement for the Synthesis of Allylic Alcohols Having a Tetrasubstituted Alkene Moiety International-journal

    Azusa Kondoh, Naoko Tasato, Takuma Aoki, Masahiro Terada

    Organic Letters 22 (13) 5170-5175 2020/07/02

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.0c01765  

    ISSN: 1523-7060

    eISSN: 1523-7052

  54. Chiral strong Brønsted acid-catalyzed enantioselective addition reaction of simple olefins with ethyl glyoxylate

    Jun Kikuchi, Yuki Aizawa, Masahiro Terada

    Organic Chemistry Frontiers 7 (11) 1383-1387 2020/06/07

    DOI: 10.1039/d0qo00448k  

    ISSN: 2052-4110

    eISSN: 2052-4129

  55. Synthesis of meta-substituted anilines via copper-catalyzed [1,3]-methoxy rearrangement International-journal

    Itaru Nakamura, Hiroki Tashiro, Yasuhiro Ishida, Masahiro Terada

    Organic Letters 22 (10) 3794-3798 2020/05/15

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.0c01009  

    ISSN: 1523-7060

    eISSN: 1523-7052

  56. Frontispiz: Development of Chiral Organosuperbase Catalysts Consisting of Two Different Organobase Functionalities

    Azusa Kondoh, Masafumi Oishi, Hikaru Tezuka, Masahiro Terada

    Angewandte Chemie 132 (19) 7542-7547 2020/05/04

    Publisher: Wiley

    DOI: 10.1002/ange.202081962  

  57. Development of Chiral Organosuperbase Catalysts Consisting of Two Different Organobase Functionalities International-journal

    Azusa Kondoh, Masafumi Oishi, Hikaru Tezuka, Masahiro Terada

    Angewandte Chemie - International Edition 59 (19) 7472-7477 2020/05/04

    Publisher: Wiley

    DOI: 10.1002/anie.202001419  

    ISSN: 1433-7851

    eISSN: 1521-3773

  58. One‐Pot Synthesis of Enantioenriched β‐Amino Secondary Amides via Enantioselective [4+2] Cycloaddition Reaction of Vinyl Azides with N‐Acyl Imines Catalyzed by Chiral Brønsted Acid Peer-reviewed

    Taishi Nakanishi, Jun Kikuchi, Atsushi Kaga, Shunsuke Chiba, Masahiro Terada

    Chemistry – A European Journal 2020/05

    DOI: 10.1002/chem.202002049  

    ISSN: 1521-3765

  59. Non-Enzymatic Hybrid Catalysis for Stereoconversion of l-Amino Acid Derivatives to d-Isomers

    Yuya Nagato, Mari Kiyokawa, Yusuke Ueki, Jun Kikuchi, Kohsuke Ohmatsu, Masahiro Terada, Takashi Ooi

    Asian Journal of Organic Chemistry 9 (4) 561-565 2020/04

    Publisher: Wiley

    DOI: 10.1002/ajoc.202000067  

    ISSN: 2193-5807

  60. Mechanism and Origin of Stereoselectivity in Chiral Phosphoric Acid-Catalyzed Aldol-Type Reactions of Azlactones with Vinyl Ethers

    Kyohei Kanomata, Yuki Nagasawa, Yukihiro Shibata, Masahiro Yamanaka, Fuyuki Egawa, Jun Kikuchi, Masahiro Terada

    Chemistry - A European Journal 26 (15) 3364-3372 2020/03/12

    Publisher: Wiley

    DOI: 10.1002/chem.201905296  

    ISSN: 0947-6539

    eISSN: 1521-3765

  61. Synthesis of Tetrasubstituted Furans through One-Pot Formal [3 + 2] Cycloaddition Utilizing [1,2]-Phospha-Brook Rearrangement International-journal

    Azusa Kondoh, Kohei Aita, Sho Ishikawa, Masahiro Terada

    Organic Letters 22 (5) 2105-2110 2020/03/06

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.0c00619  

    ISSN: 1523-7060

    eISSN: 1523-7052

  62. Development of Chiral Ureates as Chiral Strong Brønsted Base Catalysts International-journal

    Azusa Kondoh, Sho Ishikawa, Masahiro Terada

    Journal of the American Chemical Society 142 (8) 3724-3728 2020/02/26

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/jacs.9b13922  

    ISSN: 0002-7863

    eISSN: 1520-5126

  63. Heterogeneous Catalytic Reduction of Tertiary Amides with Hydrosilanes Using Unsupported Nanoporous Gold Catalyst

    Yuhui Zhao, Sheng Zhang, Yoshinori Yamamoto, Ming Bao, Tienan Jin, Masahiro Terada

    Advanced Synthesis and Catalysis 361 (20) 4817-4824 2019/10/22

    DOI: 10.1002/adsc.201900838  

    ISSN: 1615-4150

    eISSN: 1615-4169

  64. Chiral brønsted acid-catalyzed formal α-vinylation of cyclopentanones for the enantioselective construction of quaternary carbon centers

    Satavisha Kayal, Jun Kikuchi, Masahiro Shimizu, Masahiro Terada

    ACS Catalysis 9 (8) 6846-6850 2019/08/02

    DOI: 10.1021/acscatal.9b01780  

    eISSN: 2155-5435

  65. Enantioselective Addition Reaction of Azlactones with Styrene Derivatives Catalyzed by Strong Chiral Brønsted Acids

    Jun Kikuchi, Masahiro Terada

    Angewandte Chemie - International Edition 58 (25) 8458-8462 2019/06/17

    DOI: 10.1002/anie.201903111  

    ISSN: 1433-7851

    eISSN: 1521-3773

  66. Organocatalytic Nucleophilic Substitution Reaction of gem-Difluoroalkenes with Ketene Silyl Acetals

    Azusa Kondoh, Kazumi Koda, Masahiro Terada

    Organic Letters 21 (7) 2277-2280 2019/04

    DOI: 10.1021/acs.orglett.9b00566  

    ISSN: 1523-7060

    eISSN: 1523-7052

  67. F<inf>10</inf>BINOL-derived chiral phosphoric acid-catalyzed enantioselective carbonyl-ene reaction: Theoretical elucidation of stereochemical outcomes

    Jun Kikuchi, Hiromu Aramaki, Hiroshi Okamoto, Masahiro Terada

    Chemical Science 10 (5) 1426-1433 2019

    Publisher: Royal Society of Chemistry ({RSC})

    DOI: 10.1039/c8sc03587c  

    ISSN: 2041-6520

    eISSN: 2041-6539

  68. Gold-Catalyzed Cyclization/Intermolecular Methylene Transfer Sequence of O-Propargylic Oximes Derived from Glyoxylates

    Shinya Gima, Keigo Shiga, Masahiro Terada, Itaru Nakamura

    Synlett 30 (4) 393-395 2019

    Publisher: Georg Thieme Verlag {KG}

    DOI: 10.1055/s-0037-1611640  

    ISSN: 0936-5214

    eISSN: 1437-2096

  69. Au-catalyzed skeletal rearrangement of O-propargylic oximes via N-O bond cleavage with the aid of a Brønsted base cocatalyst

    Keigo Shiga, Ilya D. Gridnev, Masahiro Terada, Itaru Nakamura

    Chemical Science 10 (20) 5283-5289 2019

    DOI: 10.1039/c9sc00501c  

    ISSN: 2041-6520

    eISSN: 2041-6539

  70. Synthesis of trisubstituted allenamides utilizing 1,2-rearrangement of dialkoxyphosphoryl moiety under Brønsted base catalysis

    Azusa Kondoh, Ryosuke Ozawa, Masahiro Terada

    Chemistry Letters 48 (9) 1164-1167 2019

    DOI: 10.1246/cl.190489  

    ISSN: 0366-7022

    eISSN: 1348-0715

  71. K-Lewis acidic metal-catalyzed skeletal rearrangement reactions of o-propargylic oximes

    Itaru Nakamura, Masahiro Terada

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry 77 (10) 971-981 2019

    DOI: 10.5059/yukigoseikyokaishi.77.971  

    ISSN: 0037-9980

  72. Bis-phosphoric acid derived from BINOL dimer as a chiral brønsted acid catalyst for enantioselective transformations

    Masahiro Terada, Yogesh Gupta, Jun Kikuchi

    Chemistry Letters 48 (3) 260-263 2019

    DOI: 10.1246/cl.180977  

    ISSN: 0366-7022

    eISSN: 1348-0715

  73. Enantioselective Intramolecular Nicholas Reaction Catalyzed by Chiral Phosphoric Acid: Enantioconvergent Synthesis of Seven‐Membered Cyclic Ethers from Racemic Diols

    Yusuke Ota, Azusa Kondoh, Masahiro Terada

    Angewandte Chemie 130 (42) 14113-14117 2018/10/15

    Publisher: Wiley

    DOI: 10.1002/ange.201808239  

  74. Enantioselective Intramolecular Nicholas Reaction Catalyzed by Chiral Phosphoric Acid: Enantioconvergent Synthesis of Seven-Membered Cyclic Ethers from Racemic Diols

    Yusuke Ota, Azusa Kondoh, Masahiro Terada

    Angewandte Chemie - International Edition 57 (42) 13917-13921 2018/10/15

    Publisher: Wiley

    DOI: 10.1002/anie.201808239  

    ISSN: 1433-7851

    eISSN: 1521-3773

  75. Cover Feature: Efficient Synthesis of Polysubstituted Pyrroles Based on [3+2] Cycloaddition Strategy Utilizing [1,2]‐Phospha‐Brook Rearrangement under Brønsted Base Catalysis (Chem. Eur. J. 57/2018)

    Azusa Kondoh, Akio Iino, Sho Ishikawa, Takuma Aoki, Masahiro Terada

    Chemistry – A European Journal 24 (57) 15129-15129 2018/10/12

    Publisher: Wiley

    DOI: 10.1002/chem.201804743  

  76. Efficient Synthesis of Polysubstituted Pyrroles Based on [3+2] Cycloaddition Strategy Utilizing [1,2]-Phospha-Brook Rearrangement under Brønsted Base Catalysis

    Azusa Kondoh, Akio Iino, Sho Ishikawa, Takuma Aoki, Masahiro Terada

    Chemistry - A European Journal 24 (57) 15246-15253 2018/10/12

    Publisher: Wiley

    DOI: 10.1002/chem.201803809  

    ISSN: 0947-6539

    eISSN: 1521-3765

  77. Brønsted Base-Catalyzed Reductive Cyclization of Alkynyl α-Iminoesters through Auto-Tandem Catalysis

    Azusa Kondoh, Masahiro Terada

    Organic Letters 20 (17) 5309-5313 2018/09/07

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.8b02236  

    ISSN: 1523-7060

    eISSN: 1523-7052

  78. Organocatalytic Arylation of α-Ketoesters Based on Umpolung Strategy: Phosphazene-Catalyzed S<inf>N</inf>Ar Reaction Utilizing [1,2]-Phospha-Brook Rearrangement

    Azusa Kondoh, Takuma Aoki, Masahiro Terada

    Chemistry - A European Journal 24 (50) 13110-13113 2018/09/06

    Publisher: Wiley

    DOI: 10.1002/chem.201803218  

    ISSN: 0947-6539

    eISSN: 1521-3765

  79. Cationic cobalt-catalyzed [1,3]-rearrangement of N-alkoxycarbonyloxyanilines

    Itaru Nakamura, Mao Owada, Takeru Jo, Masahiro Terada

    Beilstein Journal of Organic Chemistry 14 1972-1979 2018/07/31

    Publisher: Beilstein Institut

    DOI: 10.3762/bjoc.14.172  

    eISSN: 1860-5397

  80. Copper-Catalyzed Domino [1,3]/[1,2] Rearrangement for the Efficient Synthesis of Multisubstituted ortho-Anisidines

    Yasuhiro Ishida, Itaru Nakamura, Masahiro Terada

    Journal of the American Chemical Society 140 (28) 8629-8633 2018/07/18

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/jacs.8b03669  

    ISSN: 0002-7863

    eISSN: 1520-5126

  81. Pd-Catalyzed Consecutive C−H-Arylation-Triggered Cyclotrimerization: Synthesis of Star-Shaped Benzotristhiazoles and Benzotrisoxazoles

    Zhanqiang Xu, Kazuaki Oniwa, Hiromasa Kikuchi, Ming Bao, Yoshinori Yamamoto, Tienan Jin, Masahiro Terada

    Chemistry - A European Journal 24 (36) 9041-9050 2018/06/26

    DOI: 10.1002/chem.201801849  

    ISSN: 0947-6539

    eISSN: 1521-3765

  82. Enantioselective Formal [3+2] Cycloaddition of Epoxides with Imines under Brønsted Base Catalysis: Synthesis of 1,3‐Oxazolidines with Quaternary Stereogenic Center

    Azusa Kondoh, Shiori Akahira, Masafumi Oishi, Masahiro Terada

    Angewandte Chemie 130 (21) 6407-6411 2018/05/22

    Publisher: Wiley

    DOI: 10.1002/ange.201802468  

  83. Enantioselective Formal [3+2] Cycloaddition of Epoxides with Imines under Brønsted Base Catalysis: Synthesis of 1,3-Oxazolidines with Quaternary Stereogenic Center

    Azusa Kondoh, Shiori Akahira, Masafumi Oishi, Masahiro Terada

    Angewandte Chemie - International Edition 57 (21) 6299-6303 2018/05/22

    DOI: 10.1002/anie.201802468  

    ISSN: 1433-7851

    eISSN: 1521-3773

  84. Brønsted Base-Catalyzed Umpolung Intramolecular Cyclization of Alkynyl Imines

    Azusa Kondoh, Masahiro Terada

    Chemistry - A European Journal 24 (16) 3998-4001 2018/03/15

    DOI: 10.1002/chem.201800219  

    ISSN: 0947-6539

    eISSN: 1521-3765

  85. Chiral Phosphoric Acid Catalyzed Enantioselective Ring Expansion Reaction of 1,3-Dithiane Derivatives: Case Study of the Nature of Ion-Pairing Interaction

    Feng Li, Toshinobu Korenaga, Taishi Nakanishi, Jun Kikuchi, Masahiro Terada

    Journal of the American Chemical Society 140 (7) 2629-2642 2018/02/21

    DOI: 10.1021/jacs.7b13274  

    ISSN: 0002-7863

    eISSN: 1520-5126

  86. Enantioselective direct Mannich-type reactions of 2-benzylpyridine N-oxides catalyzed by chiral bis(guanidino)iminophosphorane organosuperbase

    Qiupeng Hu, Azusa Kondoh, Masahiro Terada

    Chemical Science 9 (18) 4348-4351 2018

    DOI: 10.1039/c8sc00808f  

    ISSN: 2041-6520

    eISSN: 2041-6539

  87. Chiral Brønsted acid-catalyzed intramolecular S<inf>N</inf>2′ reaction for enantioselective construction of a quaternary stereogenic center

    Masahiro Shimizu, Jun Kikuchi, Azusa Kondoh, Masahiro Terada

    Chemical Science 9 (26) 5747-5757 2018

    DOI: 10.1039/c8sc01942h  

    ISSN: 2041-6520

    eISSN: 2041-6539

  88. Cu-Catalyzed switchable synthesis of functionalized pyridines and pyrroles

    Zheng Ling, Fang Xie, Ilya D. Gridnev, Masahiro Terada, Wanbin Zhang

    Chemical Communications 54 (68) 9446-9449 2018

    DOI: 10.1039/c8cc05307c  

    ISSN: 1359-7345

    eISSN: 1364-548X

  89. Efficient Synthesis of Enantioenriched Isoxazoles by Chirality Transfer in Gold-Catalyzed Cyclization/Methylene-Group Transfer Followed by Carbonyl Ene Reaction

    Shinya Gima, Itaru Nakamura, Masahiro Terada

    European Journal of Organic Chemistry 2017 (30) 4375-4378 2017/08/17

    DOI: 10.1002/ejoc.201700708  

    ISSN: 1434-193X

    eISSN: 1099-0690

  90. Cationic N-Heterocyclic Carbene Copper-Catalyzed [1,3]-Alkoxy Rearrangement of N-Alkoxyanilines

    Itaru Nakamura, Takeru Jo, Yasuhiro Ishida, Hiroki Tashiro, Masahiro Terada

    Organic Letters 19 (12) 3059-3062 2017/06/16

    DOI: 10.1021/acs.orglett.7b01110  

    ISSN: 1523-7060

    eISSN: 1523-7052

  91. Rapid Access to Nitrogenous Heterobicycles via RhIII-Catalyzed Isomerization from Alkynes to Allenes

    Itaru Nakamura, Keisuke Takeda, Yoshinori Sato, Masahiro Terada

    Chemistry - A European Journal 23 (32) 7686-7688 2017/06/07

    DOI: 10.1002/chem.201701704  

    ISSN: 0947-6539

    eISSN: 1521-3765

  92. Efficient synthesis of multisubstituted 2-alkenylpyridines via 2,3-rearrangement of O -homoallenylic oximes

    Itaru Nakamura, Yoshiharu Oyama, Dong Zhang, Masahiro Terada

    Organic Chemistry Frontiers 4 (6) 1034-1036 2017/06

    DOI: 10.1039/c6qo00703a  

    ISSN: 2052-4110

    eISSN: 2052-4129

  93. Synthesis of Enantioenriched γ-Amino-α,β-unsaturated Esters Utilizing Palladium-Catalyzed Rearrangement of Allylic Carbamates for Direct Application to Formal [3 + 2] Cycloaddition

    Azusa Kondoh, Yuji Kamata, Masahiro Terada

    Organic Letters 19 (7) 1682-1685 2017/04

    DOI: 10.1021/acs.orglett.7b00471  

    ISSN: 1523-7060

    eISSN: 1523-7052

  94. Concerted [1,3]-Rearrangement in Cationic Cobalt-Catalyzed Reaction of O-(Alkoxycarbonyl)-N-arylhydroxylamines

    Itaru Nakamura, Mao Owada, Takeru Jo, Masahiro Terada

    Organic Letters 19 (8) 2194-2196 2017/04

    DOI: 10.1021/acs.orglett.7b00700  

    ISSN: 1523-7060

    eISSN: 1523-7052

  95. Generation and Application of Homoenolate Equivalents Utilizing [1,2]-Phospha-Brook Rearrangement under Brønsted Base Catalysis

    Azusa Kondoh, Takuma Aoki, Masahiro Terada

    Chemistry - A European Journal 23 (12) 2769-2773 2017/02/24

    DOI: 10.1002/chem.201605673  

    ISSN: 0947-6539

    eISSN: 1521-3765

  96. Intramolecular addition of benzyl anion to alkyne utilizing [1,2]-phospha-Brook rearrangement under Brønsted base catalysis

    Azusa Kondoh, Ryosuke Ozawa, Takuma Aoki, Masahiro Terada

    Organic and Biomolecular Chemistry 15 (35) 7277-7281 2017

    DOI: 10.1039/c7ob02059g  

    ISSN: 1477-0520

  97. Molecular Design of a Chiral Brønsted Acid with Two Different Acidic Sites: Regio-, Diastereo-, and Enantioselective Hetero-Diels-Alder Reaction of Azopyridinecarboxylate with Amidodienes Catalyzed by Chiral Carboxylic Acid-Monophosphoric Acid

    Norie Momiyama, Hideaki Tabuse, Hirofumi Noda, Masahiro Yamanaka, Takeshi Fujinami, Katsunori Yamanishi, Atsuto Izumiseki, Kosuke Funayama, Fuyuki Egawa, Shino Okada, Hiroaki Adachi, Masahiro Terada

    Journal of the American Chemical Society 138 (35) 11353-11359 2016/09/07

    DOI: 10.1021/jacs.6b07150  

    ISSN: 0002-7863

    eISSN: 1520-5126

  98. Enantioconvergent Nucleophilic Substitution Reaction of Racemic Alkyne-Dicobalt Complex (Nicholas Reaction) Catalyzed by Chiral Brønsted Acid

    Masahiro Terada, Yusuke Ota, Feng Li, Yasunori Toda, Azusa Kondoh

    Journal of the American Chemical Society 138 (34) 11038-11043 2016/08/31

    DOI: 10.1021/jacs.6b05948  

    ISSN: 0002-7863

    eISSN: 1520-5126

  99. Novel Methodology for the Efficient Synthesis of 3-Aryloxindoles: [1,2]-Phospha-Brook Rearrangement-Palladium-Catalyzed Cross-Coupling Sequence

    Azusa Kondoh, Akira Takei, Masahiro Terada

    Synlett 27 (12) 1848-1853 2016/07/21

    DOI: 10.1055/s-0035-1561859  

    ISSN: 0936-5214

    eISSN: 1437-2096

  100. Chiral Phosphoric Acid Catalyzed Diastereo- and Enantioselective Mannich-Type Reaction between Enamides and Thiazolones

    Jun Kikuchi, Norie Momiyama, Masahiro Terada

    Organic Letters 18 (11) 2521-2523 2016/06/03

    DOI: 10.1021/acs.orglett.6b00857  

    ISSN: 1523-7060

    eISSN: 1523-7052

  101. Construction of Vicinal Quaternary Stereogenic Centers by Enantioselective Direct Mannich-Type Reaction Using a Chiral Bis(guanidino)iminophosphorane Catalyst

    Tadahiro Takeda, Azusa Kondoh, Masahiro Terada

    Angewandte Chemie - International Edition 55 (15) 4734-4737 2016/04

    DOI: 10.1002/anie.201601352  

    ISSN: 1433-7851

    eISSN: 1521-3773

  102. Enantioselective intramolecular cyclization of alkynyl esters catalyzed by a chiral Brønsted base

    Azusa Kondoh, Hoa Thi Quynh Tran, Kyoko Kimura, Masahiro Terada

    Chemical Communications 52 (33) 5726-5729 2016/04

    DOI: 10.1039/c6cc01690a  

    ISSN: 1359-7345

    eISSN: 1364-548X

  103. Hydrogen Bonds-Enabled Design of a C<inf>1</inf>-Symmetric Chiral Brønsted Acid Catalyst

    Norie Momiyama, Kosuke Funayama, Hirofumi Noda, Masahiro Yamanaka, Naohiko Akasaka, Shintaro Ishida, Takeaki Iwamoto, Masahiro Terada

    ACS Catalysis 6 (2) 949-956 2016/02/05

    DOI: 10.1021/acscatal.5b02079  

    ISSN: 2155-5435

  104. Perfluorinated Aryls in the Design of Chiral Brønsted Acid Catalysts: Catalysis of Enantioselective [4 + 2] Cycloadditions and Ene Reactions of Imines with Alkenes by Chiral Mono-Phosphoric Acids with Perfluoroaryls

    Norie Momiyama, Hiroshi Okamoto, Jun Kikuchi, Toshinobu Korenaga, Masahiro Terada

    ACS Catalysis 6 (2) 1198-1204 2016/02/05

    DOI: 10.1021/acscatal.5b02136  

    ISSN: 2155-5435

  105. Study of Stereocontrolling Elements in Chiral Phosphoric Acid Catalyzed Addition Reaction of Vinylindoles with Azlactones

    Kyohei Kanomata, Masahiro Terada

    Synlett 27 (4) 581-585 2016/02/04

    DOI: 10.1055/s-0035-1561677  

    ISSN: 0936-5214

    eISSN: 1437-2096

  106. Enantioselective aza Michael-type addition to alkenyl benzimidazoles catalyzed by a chiral phosphoric acid

    Ya Yi Wang, Kyohei Kanomata, Toshinobu Korenaga, Masahiro Terada

    Angewandte Chemie - International Edition 55 (3) 927-931 2016/01/18

    DOI: 10.1002/anie.201508231  

    ISSN: 1433-7851

    eISSN: 1521-3773

  107. Chiral Brønsted acid-catalyzed enantioselective Friedel-Crafts reaction of 2-methoxyfuran with aliphatic ketimines generated in situ

    Azusa Kondoh, Yusuke Ota, Takazumi Komuro, Fuyuki Egawa, Kyohei Kanomata, Masahiro Terada

    Chemical Science 7 (2) 1057-1062 2016

    DOI: 10.1039/c5sc03175c  

    ISSN: 2041-6520

    eISSN: 2041-6539

  108. Brønsted base-catalyzed three-component coupling reaction of α-ketoesters, imines, and diethyl phosphite utilizing [1,2]-phospha-Brook rearrangement

    Azusa Kondoh, Masahiro Terada

    Organic and Biomolecular Chemistry 14 (20) 4704-4711 2016

    DOI: 10.1039/c6ob00739b  

    ISSN: 1477-0520

  109. Synthesis of 2,3-allenylamides utilizing [1,2]-phospha-Brook rearrangement and their application to gold-catalyzed cycloisomerization providing 2-aminofuran derivatives

    Azusa Kondoh, Sho Ishikawa, Takuma Aoki, Masahiro Terada

    Chemical Communications 52 (84) 12513-12516 2016

    DOI: 10.1039/c6cc06591k  

    ISSN: 1359-7345

    eISSN: 1364-548X

  110. Enantioselective Addition of a 2-Alkoxycarbonyl-1,3-dithiane to Imines Catalyzed by a Bis(guanidino)iminophosphorane Organosuperbase

    Azusa Kondoh, Masafumi Oishi, Tadahiro Takeda, Masahiro Terada

    Angewandte Chemie - International Edition 54 (52) 15836-15839 2015/12/21

    DOI: 10.1002/anie.201508178  

    ISSN: 1433-7851

    eISSN: 1521-3773

  111. Design of a Brønsted acid with two different acidic sites: Synthesis and application of aryl phosphinic acid-phosphoric acid as a Brønsted acid catalyst

    N. Momiyama, T. Narumi, M. Terada

    Chemical Communications 51 (95) 16976-16979 2015/09/24

    DOI: 10.1039/c5cc06787a  

    ISSN: 1359-7345

    eISSN: 1364-548X

  112. Ring Expansion of Epoxides under Brønsted Base Catalysis: Formal [3+2] Cycloaddition of β,γ-Epoxy Esters with Imines Providing 2,4,5-Trisubstituted 1,3-Oxazolidines

    Azusa Kondoh, Kenta Odaira, Masahiro Terada

    Angewandte Chemie - International Edition 54 (38) 11240-11244 2015/09/14

    DOI: 10.1002/anie.201505893  

    ISSN: 1433-7851

    eISSN: 1521-3773

  113. Synthesis of Phenanthrene Derivatives by Intramolecular Cyclization Utilizing the [1,2]-Phospha-Brook Rearrangement Catalyzed by a Brønsted Base

    Azusa Kondoh, Takuma Aoki, Masahiro Terada

    Chemistry - A European Journal 21 (36) 12577-12580 2015/09/01

    DOI: 10.1002/chem.201501377  

    ISSN: 0947-6539

    eISSN: 1521-3765

  114. Synthetic Method for 2,2'-Disubstituted Fluorinated Binaphthyl Derivatives and Application as Chiral Source in Design of Chiral Mono-Phosphoric Acid Catalyst

    Norie Momiyama, Hiroshi Okamoto, Masahiro Shimizu, Masahiro Terada

    Chirality 27 (8) 464-475 2015/08/01

    DOI: 10.1002/chir.22429  

    ISSN: 0899-0042

    eISSN: 1520-636X

  115. Brønsted base-catalyzed α-oxygenation of carbonyl compounds utilizing the [1,2]-phospha-Brook rearrangement

    Azusa Kondoh, Masahiro Terada

    Organic Chemistry Frontiers 2 (7) 801-805 2015/07

    DOI: 10.1039/c5qo00108k  

    ISSN: 2052-4110

    eISSN: 2052-4129

  116. Skeletal rearrangement of O-propargylic formaldoximes by a gold-catalyzed cyclization/intermolecular methylene transfer sequence

    Itaru Nakamura, Shinya Gima, Yu Kudo, Masahiro Terada

    Angewandte Chemie - International Edition 54 (24) 7154-7157 2015/06/01

    DOI: 10.1002/anie.201501856  

    ISSN: 1433-7851

    eISSN: 1521-3773

  117. Copper-catalyzed skeletal rearrangements of O-propargylic oximes via cleavage of a carbon-oxygen bond

    Itaru Nakamura, Masahiro Terada

    Chemical Record 15 (2) 429-444 2015/04

    DOI: 10.1002/tcr.201402088  

    ISSN: 1527-8999

    eISSN: 1528-0691

  118. Kinetic resolution of racemic amino alcohols through intermolecular acetalization catalyzed by a chiral Brønsted acid

    Takuto Yamanaka, Azusa Kondoh, Masahiro Terada

    Journal of the American Chemical Society 137 (3) 1048-1051 2015/01/28

    DOI: 10.1021/ja512238n  

    ISSN: 0002-7863

    eISSN: 1520-5126

  119. Synthesis of intermediary P3 phosphazenium framework and its derivatization to chiral cationic macrocycles including two P3 phosphazenium units with hydrogen bond donor sites

    Masahiro Terada, Kengo Goto, Takashi Ikehara, Azusa Kondoh

    Heterocycles 90 (2) 1396-1404 2015

    DOI: 10.3987/COM-14-S(K)98  

    ISSN: 0385-5414

    eISSN: 1881-0942

  120. Copper-catalyzed cascade transformation of O-propargylic oximes with sulfonyl azides to α,β-unsaturated N-acylamidines

    Dong Zhang, Itaru Nakamura, Masahiro Terada

    Organic Letters 16 (19) 5184-5187 2014/10/03

    DOI: 10.1021/ol502541w  

    ISSN: 1523-7060

    eISSN: 1523-7052

  121. N-Allenylnitrone acts as 2-azadiene in the Cu-catalyzed cascade reaction of O-propargylic oximes with azodicarboxylates

    Itaru Nakamura, Takeru Jo, Dong Zhang, Masahiro Terada

    Organic Chemistry Frontiers 1 (8) 914-918 2014/10/01

    DOI: 10.1039/c4qo00156g  

    ISSN: 2052-4110

    eISSN: 2052-4129

  122. Secondary stereocontrolling interactions in chiral Brønsted acid catalysis: Study of a Petasis-Ferrier-type rearrangement catalyzed by chiral phosphoric acids

    Kyohei Kanomata, Yasunori Toda, Yukihiro Shibata, Masahiro Yamanaka, Seiji Tsuzuki, Ilya D. Gridnev, Masahiro Terada

    Chemical Science 5 (9) 3515-3523 2014/09

    DOI: 10.1039/c4sc00611a  

    ISSN: 2041-6520

    eISSN: 2041-6539

  123. Efficient synthesis of N- alkylated α,β-unsaturated ketonitrones via cu-catalyzed rearrangement

    Itaru Nakamura, Toshiki Onuma, Ryo Kanazawa, Yuki Nishigai, Masahiro Terada

    Organic Letters 16 (16) 4198-4200 2014/08/15

    DOI: 10.1021/ol501889g  

    ISSN: 1523-7060

    eISSN: 1523-7052

  124. Efficient synthesis of eight-membered nitrogen heterocycles from O-propargylic oximes by rhodium-catalyzed cascade reactions

    Itaru Nakamura, Yoshinori Sato, Keisuke Takeda, Masahiro Terada

    Chemistry - A European Journal 20 (33) 10214-10219 2014/08/11

    DOI: 10.1002/chem.201403637  

    ISSN: 0947-6539

    eISSN: 1521-3765

  125. Intramolecular cyclization of alkynyl α-ketoanilide utilizing [1,2]-phospha-brook rearrangement catalyzed by phosphazene base

    Azusa Kondoh, Takuma Aoki, Masahiro Terada

    Organic Letters 16 (13) 3528-3531 2014/07/03

    DOI: 10.1021/ol501479t  

    ISSN: 1523-7060

    eISSN: 1523-7052

  126. Mechanistic studies of highly enantio-and diastereoselective aza-petasis-ferrier rearrangement catalyzed by chiral phosphoric acid

    Masahiro Terada, Takazumi Komuro, Yasunori Toda, Toshinobu Korenaga

    Journal of the American Chemical Society 136 (19) 7044-7057 2014/05/14

    DOI: 10.1021/ja5017206  

    ISSN: 0002-7863

    eISSN: 1520-5126

  127. Cu-catalyzed skeletal rearrangement of O-propargylic electron-rich arylaldoximes into amidodienes

    Itaru Nakamura, Yasuhiro Ishida, Masahiro Terada

    Organic Letters 16 (9) 2562-2565 2014/05/02

    DOI: 10.1021/ol5009608  

    ISSN: 1523-7060

    eISSN: 1523-7052

  128. Binaphthol-derived phosphoric acids as efficient chiral organocatalysts for the enantiomer-selective polymerization of rac-lactide

    Kosuke Makiguchi, Takuto Yamanaka, Toyoji Kakuchi, Masahiro Terada, Toshifumi Satoh

    Chemical Communications 50 (23) 2883-2885 2014/02/20

    DOI: 10.1039/c4cc00215f  

    ISSN: 1359-7345

    eISSN: 1364-548X

  129. Synthesis of 1,6-dihydropyrimidines via copper-catalyzed multistep cascade reactions between O-propargylic aldoximes and isocyanates

    Itaru Nakamura, Toshiki Onuma, Dong Zhang, Masahiro Terada

    Tetrahedron Letters 55 (6) 1178-1182 2014/02/05

    DOI: 10.1016/j.tetlet.2013.12.105  

    ISSN: 0040-4039

    eISSN: 1873-3581

  130. Chiral silver phosphate catalyzed transformation of ortho-alkynylaryl ketones into 1H-isochromene derivatives through an intramolecular-cyclization/ enantioselective-reduction sequence

    Masahiro Terada, Feng Li, Yasunori Toda

    Angewandte Chemie - International Edition 53 (1) 235-239 2014/01/03

    DOI: 10.1002/anie.201307371  

    ISSN: 1433-7851

    eISSN: 1521-3773

  131. Preface

    Masahiro Terada

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry 72 (2) 117 2014

    DOI: 10.5059/yukigoseikyokaishi.72.117  

    ISSN: 0037-9980

  132. Synthesis of bulky aryl group-substituted chiral bis(guanidino) iminophosphoranes as uncharged chiral organosuperbase catalysts

    Tadahiro Takeda, Masahiro Terada

    Australian Journal of Chemistry 67 (7) 1124-1128 2014

    DOI: 10.1071/CH14195  

    ISSN: 0004-9425

    eISSN: 1445-0038

  133. Development of a chiral bis(guanidino)iminophosphorane as an uncharged organosuperbase for the enantioselective amination of ketones

    Tadahiro Takeda, Masahiro Terada

    Journal of the American Chemical Society 135 (41) 15306-15309 2013/10/16

    DOI: 10.1021/ja408296h  

    ISSN: 0002-7863

    eISSN: 1520-5126

  134. Phosphazene-catalyzed intramolecular cyclization of nitrogen-tethered alkynyl esters

    Azusa Kondoh, Kenichi Ando, Masahiro Terada

    Chemical Communications 49 (87) 10254-10256 2013/10/08

    DOI: 10.1039/c3cc46100a  

    ISSN: 1359-7345

    eISSN: 1364-548X

  135. Chiral anion catalysis in the enantioselective 1,4-reduction of the 1-benzopyrylium ion as a reactive intermediate

    Masahiro Terada, Takuto Yamanaka, Yasunori Toda

    Chemistry - A European Journal 19 (41) 13658-13662 2013/10/04

    DOI: 10.1002/chem.201302486  

    ISSN: 0947-6539

    eISSN: 1521-3765

  136. Brønsted base catalyzed [2,3]-Wittig/phospha-Brook tandem rearrangement sequence

    Azusa Kondoh, Masahiro Terada

    Organic Letters 15 (17) 4568-4571 2013/09/06

    DOI: 10.1021/ol402144q  

    ISSN: 1523-7060

    eISSN: 1523-7052

  137. Oxazepine synthesis by copper-catalyzed intermolecular cascade reactions between O-propargylic oximes and dipolarophiles

    Itaru Nakamura, Yu Kudo, Masahiro Terada

    Angewandte Chemie - International Edition 52 (29) 7536-7539 2013/07/15

    DOI: 10.1002/anie.201302751  

    ISSN: 1433-7851

    eISSN: 1521-3773

  138. Asymmetric C-C Bond Formation Using Chiral Guanidine Catalysts

    Masahiro Terada

    Asymmetric Synthesis II: More Methods and Applications 273-278 2013/01/14

    DOI: 10.1002/9783527652235.ch34  

  139. Design and synthesis of helically chiral spirocyclic P3 phosphazenes and characterization of their onium salts

    Masahiro Terada, Kengo Goto, Masafumi Oishi, Tadahiro Takeda, Eunsang Kwon, Azusa Kondoh

    Synlett 24 (19) 2531-2534 2013

    DOI: 10.1055/s-0033-1340058  

    ISSN: 0936-5214

    eISSN: 1437-2096

  140. Relay catalysis by a ruthenium complex-chiral bronsted acid binary sytem for ternary reaction sequence involving enantioselective pictet-spengler-type cyclization as the key step

    Yasunori Toda, Masahiro Terada

    Synlett 24 (6) 752-756 2013

    DOI: 10.1055/s-0032-1318302  

    ISSN: 0936-5214

    eISSN: 1437-2096

  141. Synthesis of azepine derivatives by rhodium-catalyzed tandem 2,3-rearrangement/heterocyclization

    Itaru Nakamura, Masashi Okamoto, Yoshinori Sato, Masahiro Terada

    Angewandte Chemie - International Edition 51 (43) 10816-10819 2012/10/22

    DOI: 10.1002/anie.201205285  

    ISSN: 1433-7851

    eISSN: 1521-3773

  142. Guanidine/Azole Binary System as an Efficient Catalyst for Morita-Baylis-Hillman Reaction

    Masahiro Terada, Satoko Fukuchi, Kei Amagai, Megumi Nakano, Hitoshi Ube

    ChemCatChem 4 (7) 963-967 2012/07

    DOI: 10.1002/cctc.201200149  

    ISSN: 1867-3880

    eISSN: 1867-3899

  143. Synthesis of unsymmetrically substituted 2,2’-dihydroxy-1,1’-biaryl derivatives using organic-base-catalyzed Ferrier-type rearrangement as the key step

    Masahiro Terada, Katsunori Dan

    Chemical Communications 48 (46) 5781-5783 2012/05/14

    DOI: 10.1039/c2cc31594g  

    ISSN: 1359-7345

    eISSN: 1364-548X

  144. Relay catalysis using a rhodium complex/chiral Brønsted acid binary system: Enantioselective reduction of a carbonyl ylide as the reactive intermediate

    Masahiro Terada, Yasunori Toda

    Angewandte Chemie - International Edition 51 (9) 2093-2097 2012/02/27

    DOI: 10.1002/anie.201107805  

    ISSN: 1433-7851

    eISSN: 1521-3773

  145. Copper-catalyzed skeletal rearrangement of O-propargylic alkylaldoximes via N-O bond cleavage

    Itaru Nakamura, Tomoki Iwata, Dong Zhang, Masahiro Terada

    Organic Letters 14 (1) 206-209 2012/01/06

    DOI: 10.1021/ol203001w  

    ISSN: 1523-7060

    eISSN: 1523-7052

  146. Copper-catalyzed skeletal rearrangement of o -propargylic aryloximes into four-membered cyclic nitrones - Chirality transfer and mechanistic insight

    Itaru Nakamura, Yu Kudo, Toshiharu Araki, Dong Zhang, Eunsang Kwon, Masahiro Terada

    Synthesis 44 (10) 1542-1550 2012

    DOI: 10.1055/s-0031-1290819  

    ISSN: 0039-7881

    eISSN: 1437-210X

  147. Chiral Brønsted acid catalyzed stereoselective addition of azlactones to 3-vinylindoles for facile access to enantioenriched tryptophan derivatives

    Masahiro Terada, Kenichi Moriya, Kyohei Kanomata, Keiichi Sorimachi

    Angewandte Chemie - International Edition 50 (52) 12586-12590 2011/12/23

    DOI: 10.1002/anie.201105562  

    ISSN: 1433-7851

    eISSN: 1521-3773

  148. Highly stereoselective [4+2] cycloaddition of azlactones to β,γ-unsaturated α-ketoesters catalyzed by an axially chiral guanidine base

    Masahiro Terada, Hiroyuki Nii

    Chemistry - A European Journal 17 (6) 1760-1763 2011/12/07

    DOI: 10.1002/chem.201003015  

    ISSN: 0947-6539

    eISSN: 1521-3765

  149. Design of chiral bis-phosphoric acid catalyst derived from (R)-3,3′-Di(2-hydroxy-3-arylphenyl)binaphthol: Catalytic enantioselective Diels-Alder reaction of α,β-unsaturated aldehydes with amidodienes

    Norie Momiyama, Tohru Konno, Yuichi Furiya, Takeaki Iwamoto, Masahiro Terada

    Journal of the American Chemical Society 133 (48) 19294-19297 2011/12/07

    DOI: 10.1021/ja2081444  

    ISSN: 0002-7863

    eISSN: 1520-5126

  150. Thermally-induced skeletal rearrangement of (Z)-O-propargylic α,β-unsaturated aldoximes to multisubstituted pyridine oxides

    Itaru Nakamura, Dong Zhang, Masahiro Terada

    Tetrahedron Letters 52 (48) 6470-6472 2011/11/30

    DOI: 10.1016/j.tetlet.2011.09.107  

    ISSN: 0040-4039

    eISSN: 1873-3581

  151. Platinum-catalyzed cycloisomerization of 1,4-enynes via 1,2-alkenyl rearrangement

    Takuma Sato, Toshiki Onuma, Itaru Nakamura, Masahiro Terada

    Organic Letters 13 (19) 4992-4995 2011/10/07

    DOI: 10.1021/ol202104c  

    ISSN: 1523-7060

    eISSN: 1523-7052

  152. Erratum: Direct enantioselective amination of α-ketoesters catalyzed by an axially chiral guanidine base (Chemistry - A European Journal 17 (2011))

    Masahiro Terada, Kei Amagai, Kenichi Ando, Eunsang Kwon, Hitoshi Ube

    Chemistry - A European Journal 17 (36) 9858 2011/08/29

    DOI: 10.1002/chem.201102286  

    ISSN: 0947-6539

    eISSN: 1521-3765

  153. Direct enantioselective amination of α-ketoesters catalyzed by an axially chiral guanidine base Peer-reviewed

    Masahiro Terada, Kei Amagai, Kenichi Ando, Eunsang Kwon, Hitoshi Ube

    Chemistry - A European Journal 17 (33) 9037-9041 2011/08/08

    DOI: 10.1002/chem.201101076  

    ISSN: 0947-6539

    eISSN: 1521-3765

  154. Regioselective transformation of O-propargylic arylaldoximes to four-membered cyclic nitrones by copper-catalyzed skeletal rearrangement

    Itaru Nakamura, Toshiharu Araki, Dong Zhang, Yu Kudo, Eunsang Kwon, Masahiro Terada

    Organic Letters 13 (14) 3616-3619 2011/07/15

    DOI: 10.1021/ol2012583  

    ISSN: 1523-7060

    eISSN: 1523-7052

  155. Enantioselective carbon-carbon bond forming reactions catalyzed by chiral phosphoric acid catalysts

    Masahiro Terada

    Current Organic Chemistry 15 (13) 2227-2256 2011/07

    DOI: 10.2174/138527211796150732  

    ISSN: 1385-2728

    eISSN: 1875-5348

  156. Erratum: Five-bond cleavage in copper-catalyzed skeletal rearrangement of O-propargyl arylaldoximes to β-lactams (Journal of the American Chemical Society (2009) 131 (2804-2805) DOI: 10.1021/ja900133m)

    Itaru Nakamura, Toshiharu Araki, Masahiro Terada

    Journal of the American Chemical Society 133 (17) 6861 2011/05/04

    DOI: 10.1021/ja201074e  

    ISSN: 0002-7863

    eISSN: 1520-5126

  157. Erratum: Copper-catalyzed tandem [2,3]-rearrangement and 6π-3-azatriene electrocyclization in (E)-O-propargylic α,β-unsaturated oximes (Journal of the American Chemical Society (2010) 132 (7884-7886) DOI: 10.1021/ja102436z)

    Itaru Nakamura, Dong Zhang, Masahiro Terada

    Journal of the American Chemical Society 133 (17) 6862 2011/05/04

    DOI: 10.1021/ja201076c  

    ISSN: 0002-7863

    eISSN: 1520-5126

  158. Chiral brønsted acid catalysis for enantioselective hosomi-sakurai reaction of imines with allyltrimethylsilane Peer-reviewed

    Norie Momiyama, Hayato Nishimoto, Masahiro Terada

    Organic Letters 13 (8) 2126-2129 2011/04

    DOI: 10.1021/ol200595b  

    ISSN: 1523-7060

    eISSN: 1523-7052

  159. Enantioselective direct vinylogous michael addition of functionalized furanones to nitroalkenes catalyzed by an axially chiral guanidine base Peer-reviewed

    Masahiro Terada, Kenichi Ando

    Organic Letters 13 (8) 2026-2029 2011/04

    DOI: 10.1021/ol200415u  

    ISSN: 1523-7060

    eISSN: 1523-7052

  160. Metal-free chiral phosphoric acid or chiral metal phosphate as active catalyst in the activation of N -acyl aldimines

    Masahiro Terada, Kyohei Kanomata

    Synlett (9) 1255-1258 2011

    DOI: 10.1055/s-0030-1260545  

    ISSN: 0936-5214

    eISSN: 1437-2096

  161. Copper-catalyzed rearrangement of (Z)-propynal hydrazones via N-N bond cleavage

    Itaru Nakamura, Naozumi Shiraiwa, Ryo Kanazawa, Masahiro Terada

    Organic Letters 12 (18) 4198-4200 2010/09/17

    DOI: 10.1021/ol1017504  

    ISSN: 1523-7060

    eISSN: 1523-7052

  162. Enantioselective Synthesis of Amines by Chiral Brønsted Acid Catalysts

    Masahiro Terada, Norie Momiyama

    Chiral Amine Synthesis: Methods, Developments and Applications 75-129 2010/08/04

    DOI: 10.1002/9783527629541.ch3  

  163. Copper-catalyzed tandem [2,3]-Rearrangement and 6π-3-Azatriene electrocyclization in (E) -O -Propargylic α,β-Unsaturated oximes Peer-reviewed

    Itaru Nakamura, Dong Zhang, Masahiro Terada

    Journal of the American Chemical Society 132 (23) 7884-7886 2010/06/16

    DOI: 10.1021/ja102436z  

    ISSN: 0002-7863

    eISSN: 1520-5126

  164. Gold-catalyzed cyclization and subsequent arylidene group transfer of O-propioloyl oximes

    Itaru Nakamura, Masashi Okamoto, Masahiro Terada

    Organic Letters 12 (11) 2453-2455 2010/06/04

    DOI: 10.1021/ol100581m  

    ISSN: 1523-7060

    eISSN: 1523-7052

  165. Enantioselective aza-Friedel-Crafts reaction catalyzed by a water inclusion complex of O,O′-diacyl tartaric acid Peer-reviewed

    Hitoshi Ube, Satoko Fukuchi, Masahiro Terada

    Tetrahedron Asymmetry 21 (9-10) 1203-1205 2010/05/17

    DOI: 10.1016/j.tetasy.2010.04.012  

    ISSN: 0957-4166

    eISSN: 1362-511X

  166. Asymmetrie direct vinylogous aldol reaction of furanone derivatives catalyzed by an axially chiral guanidine base Peer-reviewed

    Hitoshi Ube, Naoki Shimada, Masahiro Terada

    Angewandte Chemie - International Edition 49 (10) 1858-1861 2010/03/01

    DOI: 10.1002/anie.200906647  

    ISSN: 1433-7851

    eISSN: 1521-3773

  167. Dichotomous control of E/Z-geometry in intramolecular cyclization of o-alkynylbenzamide derivatives catalyzed by organic superbase P4-tBu in the presence/absence of water

    Chikashi Kanazawa, Masahiro Terada

    Chemistry - An Asian Journal 4 (11) 2009/11/02

    DOI: 10.1002/asia.200900342  

    ISSN: 1861-4728

    eISSN: 1861-471X

  168. Enantioselective electrophilic amination of α-cyanothioacetates with azodicarboxylates catalyzed by an axially chiral guanidine base

    Masahiro Terada, Daisuke Tsushima, Megumi Nakano

    Advanced Synthesis and Catalysis 351 (17) 2817-2821 2009/11

    DOI: 10.1002/adsc.200900594  

    ISSN: 1615-4150

    eISSN: 1521-3897

  169. Chiral phosphoric acid-governed anti-diastereoselective and enantioselective Hetero-Diels - Alder reaction of glyoxylate Peer-reviewed

    Norie Momiyama, Hideaki Tabuse, Masahiro Terada

    Journal of the American Chemical Society 131 (36) 12882-12883 2009/09/16

    DOI: 10.1021/ja904749x  

    ISSN: 0002-7863

  170. Enantioselective Henry (nitroaldol) reaction catalyzed by axially chiral guanidines

    Hitoshi Ube, Masahiro Terada

    Bioorganic and Medicinal Chemistry Letters 19 (14) 3895-3898 2009/07/15

    DOI: 10.1016/j.bmcl.2009.03.097  

    ISSN: 0960-894X

    eISSN: 1464-3405

  171. Acid-base dual-functional catalysis by axially chiral guanidine in enantioselective [3+2] cycloaddition of maleate to Schiff bases as a precursor of azomethine ylides

    Megumi Nakano, Masahiro Terada

    Synlett (10) 1670-1674 2009/06

    DOI: 10.1055/s-0029-1217345  

    ISSN: 0936-5214

    eISSN: 1437-2096

  172. Double bond isomerization/enantioselective aza-petasis-ferrier rearrangement sequence as an efficient entry to anti- and enantioenriched β-Amino Aldehydes Peer-reviewed

    Masahiro Terada, Yasunori Toda

    Journal of the American Chemical Society 131 (18) 6354-6355 2009/05/13

    DOI: 10.1021/ja902202g  

    ISSN: 0002-7863

  173. Platinum-catalyzed consecutive C-N bond formation-[1,3] shift of carbamoyl and ester groups

    Itaru Nakamura, Yusuke Sato, Sayaka Konta, Masahiro Terada

    Tetrahedron Letters 50 (18) 2075-2077 2009/05/06

    DOI: 10.1016/j.tetlet.2009.02.108  

    ISSN: 0040-4039

  174. Stereochemical control by an ester group or olefin ligand in platinum-catalyzed carboalkoxylation of 6-(1-alkoxyethoxy)-hex-2-ynoates

    Itaru Nakamura, Ching Siew Chan, Toshiharu Araki, Masahiro Terada, Yoshinori Yamamoto

    Advanced Synthesis and Catalysis 351 (7-8) 1089-1100 2009/05

    DOI: 10.1002/adsc.200800772  

    ISSN: 1615-4150

    eISSN: 1521-3897

  175. Platinum-catalyzed dehydroalkoxylation-cyclization cascade via N-O bond cleavage Peer-reviewed

    Itaru Nakamura, Yusuke Sato, Masahiro Terada

    Journal of the American Chemical Society 131 (12) 4198-4199 2009/04

    DOI: 10.1021/ja900174t  

    ISSN: 0002-7863

  176. Activation of hemiaminal ethers by chiral brønsted acids for facile access to enantioselective two-carbon homologation using eneearbamates Peer-reviewed

    Masahiro Terada, Kyoko Machioka, Keiichi Sorimachi

    Angewandte Chemie - International Edition 48 (14) 2553-2556 2009/03/23

    DOI: 10.1002/anie.200805385  

    ISSN: 1433-7851

  177. Enantioselective direct aldol-type reaction of azlactone via protonation of vinyl ethers by a chiral brønsted acid catalyst Peer-reviewed

    Masahiro Terada, Hiroyasu Tanaka, Keiichi Sorimachi

    Journal of the American Chemical Society 131 (10) 3430-3431 2009/03/18

    DOI: 10.1021/ja8090643  

    ISSN: 0002-7863

  178. Palladium-catalyzed indolization of N-aroylbenzotriazoles with disubstituted alkynes

    Ltaru Nakamura, Tetsuya Nemoto, Naozumi Shiraiwa, Masahiro Terada

    Organic Letters 11 (5) 1055-1058 2009/03/05

    DOI: 10.1021/ol900113f  

    ISSN: 1523-7060

  179. Five-bond cleavage in copper-catalyzed skeletal rearrangement of n O-propargyl arylaldoximes to β-lactams Peer-reviewed

    Itaru Nakamura, Toshiharu Araki, Masahiro Terada

    Journal of the American Chemical Society 131 (8) 2804-2805 2009/03/04

    DOI: 10.1021/ja900133m  

    ISSN: 0002-7863

  180. Phosphazene-base-catalyzed tandem addition-cyclization reaction of o-alkynylbenzaldehyde with oxygen and nitrogen nucleophiles

    Chikashi Kanazawa, Akira Ito, Masahiro Terada

    Synlett (4) 638-642 2009/03

    DOI: 10.1055/s-0028-1087909  

    ISSN: 0936-5214

    eISSN: 1437-2096

  181. Gold-catalyzed consecutive [1,2] alkyl migration-oxygen transfer reaction of 2-alkynyl-1-tetralones

    Ching Siew Chan, Toshiharu Araki, Itaru Nakamura, Masahiro Terada

    Tetrahedron Letters 50 (2) 216-218 2009/01/14

    DOI: 10.1016/j.tetlet.2008.10.129  

    ISSN: 0040-4039

  182. Phosphazene base-catalyzed intramolecular cyclization for efficient synthesis of benzofurans via carbon-carbon bond formation

    Chikashi Kanazawa, Kengo Goto, Masahiro Terada

    Chemical Communications (35) 5248-5250 2009

    DOI: 10.1039/b913588j  

    ISSN: 1359-7345

  183. Platinum-catalyzed multisubstituted benzo[b]selenophene synthesis

    Takuma Sato, Itaru Nakamura, Masahiro Terada

    European Journal of Organic Chemistry (32) 5509-5512 2009

    DOI: 10.1002/ejoc.200900894  

    ISSN: 1434-193X

    eISSN: 1099-0690

  184. Relay catalysis by a metal-complex/brønsted acid binary system in a tandem isomerization/carbon-carbon bond forming sequence Peer-reviewed

    Keiichi Sorimachi, Masahiro Terada

    Journal of the American Chemical Society 130 (44) 14452-14453 2008/11/05

    DOI: 10.1021/ja807591m  

    ISSN: 0002-7863

  185. Asymmetric epoxidation of α,β-unsaturated ketones with hydrogen peroxide catalyzed by axially chiral guanidine base

    Masahiro Terada, Megumi Nakano

    Heterocycles 76 (2) 1049-1055 2008/11/01

    DOI: 10.3987/COM-08-S(N)105  

    ISSN: 0385-5414

    eISSN: 1881-0942

  186. Asymmetric direct Mannich reaction catalyzed by chiral Brønsted acid via activation of enecarbamate as an aliphatic imine alternative Invited Peer-reviewed

    Masahiro Terada, Hiroyasu Tanaka, Keiichi Sorimachi

    Synlett (11) 1661-1664 2008/07/01

    DOI: 10.1055/s-2008-1078495  

    ISSN: 0936-5214

  187. Enantioselective activation of aldehydes by chiral phosphoric acid catalysts in an aza-ene-type reaction between glyoxylate and enecarbamate Peer-reviewed

    Masahiro Terada, Kazuyo Soga, Norie Momiyama

    Angewandte Chemie - International Edition 47 (22) 4122-4125 2008/05/19

    DOI: 10.1002/anie.200800232  

    ISSN: 1433-7851

    eISSN: 1521-3773

  188. Chiral Ti(IV) Lewis Acids

    Koichi Mikami, Masahiro Terada

    Lewis Acids in Organic Synthesis 799-847 2008/04

    DOI: 10.1002/9783527618309.ch16  

  189. Synthesis of multisubstituted 2-(dihydrofuran-2(3H)-ylidene)acetates via intramolecular carboalkoxylation by platinum-olefin catalyst system Peer-reviewed

    Itaru Nakamura, Siew Chan Ching, Toshiharu Araki, Masahiro Terada, Yoshinori Yamamoto

    Organic Letters 10 (2) 309-312 2008/01/17

    DOI: 10.1021/ol702795u  

    ISSN: 1523-7060

  190. Chirality transfer in gold-catalyzed carbothiolation of o-alkynylphenyl 1-arylethyl sulfides

    Itaru Nakamura, Takuma Sato, Masahiro Terada, Yoshinori Yamamoto

    Organic Letters 10 (13) 2649-2651 2008

    DOI: 10.1021/ol8007556  

    ISSN: 1523-7060

  191. Theoretical studies of 5-exo selective intramolecular cyclization of o-alkynylbenzoic acid catalyzed by organic base

    Masahiro Terada, Chikashi Kanazawa, Masahiro Yamanaka

    Heterocycles 74 (C) 819-825 2007/12/31

    DOI: 10.3987/com-07-s(w)73  

    ISSN: 0385-5414

  192. Aza-Henry reaction of ketimines catalyzed by guanidine and phosphazene bases Peer-reviewed

    Nirmal K. Pahadi, Hitoshi Ube, Masahiro Terada

    Tetrahedron Letters 48 (49) 8700-8703 2007/12/03

    DOI: 10.1016/j.tetlet.2007.10.016  

    ISSN: 0040-4039

  193. Enantioselective 1,4-addition reactions of diphenyl phosphite to nitroalkenes catalyzed by an axially chiral guanidine Peer-reviewed

    Masahiro Terada, Takashi Ikehara, Hitoshi Ube

    Journal of the American Chemical Society 129 (46) 14112-14113 2007/11/21

    DOI: 10.1021/ja0746619  

    ISSN: 0002-7863

  194. Gold-catalyzed cyclization of (ortho-alkynylphenylthio)silanes: Intramolecular capture of the vinyl-au intermediate by the silicon electrophile Peer-reviewed

    Itaru Nakamura, Takuma Sato, Masahiro Terada, Yoshinori Yamamoto

    Organic Letters 9 (20) 4081-4083 2007/09/27

    DOI: 10.1021/ol701951n  

    ISSN: 1523-7060

  195. Chiral Brønsted acid-catalyzed tandem aza-ene type reaction/cyclization cascade for a one-pot entry to enantioenriched piperidines Peer-reviewed

    Masahiro Terada, Kyoko Machioka, Keiichi Sorimachi

    Journal of the American Chemical Society 129 (34) 10336-10337 2007/08/29

    DOI: 10.1021/ja0739584  

    ISSN: 0002-7863

  196. Chiral phosphoric acid-catalyzed enantioselective aza-Friedel-Crafts reaction of indoles Peer-reviewed

    Masahiro Terada, Shigeko Yokoyama, Keiichi Sorimachi, Daisuke Uraguchi

    Advanced Synthesis and Catalysis 349 (11-12) 1863-1867 2007/08

    DOI: 10.1002/adsc.200700151  

    ISSN: 1615-4150

    eISSN: 1521-3897

  197. Organic-base-catalyzed synthesis of phthalides via highly regioselective intramolecular cyclization reaction Peer-reviewed

    Chikashi Kanazawa, Masahiro Terada

    Tetrahedron Letters 48 (6) 933-935 2007/02/05

    DOI: 10.1016/j.tetlet.2006.12.015  

    ISSN: 0040-4039

  198. Enantioselective Friedel-Crafts reaction of electron-rich alkenes catalyzed by chiral Brønsted acid Peer-reviewed

    Masahiro Terada, Keiichi Sorimachi

    Journal of the American Chemical Society 129 (2) 292-293 2007/01/17

    DOI: 10.1021/ja0678166  

    ISSN: 0002-7863

  199. On the mechanism of stereoselection in direct Mannich reaction catalyzed by BINOL-derived phosphoric acids Peer-reviewed

    Ilya D. Gridnev, Mitsuhiro Kouchi, Keiichi Sorimachi, Masahiro Terada

    Tetrahedron Letters 48 (3) 497-500 2007/01/15

    DOI: 10.1016/j.tetlet.2006.11.017  

    ISSN: 0040-4039

  200. Thermally induced [2+2] cycloadditions of (benzyloxymethylene)cyclopropane with alkylidenemalononitriles Peer-reviewed

    Itaru Nakamura, Ryoko Nagata, Tetsuya Nemoto, Masahiro Terada, Yoshinori Yamamoto, Thomas Späth, Armin De Meijere

    European Journal of Organic Chemistry (27) 4479-4482 2007

    DOI: 10.1002/ejoc.200700531  

    ISSN: 1434-193X

    eISSN: 1099-0690

  201. Efficient synthetic protocol for substituted guanidines via copper(I)-mediated intermolecular amination of isothiourea derivatives Peer-reviewed

    Hitoshi Ube, Daisuke Uraguchi, Masahiro Terada

    Journal of Organometallic Chemistry 692 (1-3) 545-549 2007/01/01

    DOI: 10.1016/j.jorganchem.2006.06.046  

    ISSN: 0022-328X

  202. Axially chiral guanidine as highly active and enantioselective catalyst for electrophilic amination of unsymmetrically substituted 1,3-dicarbonyl compounds Peer-reviewed

    Masahiro Terada, Megumi Nakano, Hitoshi Ube

    Journal of the American Chemical Society 128 (50) 16044-16045 2006/12/20

    DOI: 10.1021/ja066808m  

    ISSN: 0002-7863

  203. High substrate/catalyst organocatalysis by a chiral Brønsted acid for an enantioselective aza-ene-type reaction Peer-reviewed

    Masahiro Terada, Kyoko Machioka, Keiichi Sorimachi

    Angewandte Chemie - International Edition 45 (14) 2254-2257 2006/03/27

    DOI: 10.1002/anie.200503477  

    ISSN: 1433-7851

    eISSN: 1521-3773

  204. Axially chiral guanidine as enantioselective base catalyst for 1,4-addition reaction of 1,3-dicarbonyl compounds with conjugated nitroalkenes Peer-reviewed

    Masahiro Terada, Hitoshi Ube, Yusuke Yaguchi

    Journal of the American Chemical Society 128 (5) 1454-1455 2006/02/08

    DOI: 10.1021/ja057848d  

    ISSN: 0002-7863

  205. Novel metal-free Lewis acid catalysis by phosphonium salts through hypervalent interaction

    Masahiro Terada, Mitsuhiro Kouchi

    Tetrahedron 62 (2-3) 401-409 2006/01/09

    DOI: 10.1016/j.tet.2005.09.075  

    ISSN: 0040-4020

  206. Phosphorodiamidic acid as a novel structural motif of Brønsted acid catalysts for direct Mannich reaction of N-acyl imines with 1,3-dicarbonyl compounds

    Masahiro Terada, Keiichi Sorimachi, Daisuke Uraguchi

    Synlett (1) 133-136 2006/01/05

    DOI: 10.1055/s-2005-922783  

    ISSN: 0936-5214

  207. Organocatalytic asymmetric direct alkylation of α-diazoester via C-H bond cleavage Peer-reviewed

    Daisuke Uraguchi, Keiichi Sorimachi, Masahiro Terada

    Journal of the American Chemical Society 127 (26) 9360-9361 2005/07/06

    DOI: 10.1021/ja051922a  

    ISSN: 0002-7863

  208. Organocatalytic asymmetric aza-Friedel-Crafts alkylation of furan Peer-reviewed

    Daisuke Uraguchi, Keiichi Sorimachi, Masahiro Terada

    Journal of the American Chemical Society 126 (38) 11804-11805 2004/09/29

    DOI: 10.1021/ja046185h  

    ISSN: 0002-7863

  209. Chiral Brønsted Acid-Catalyzed Direct Mannich Reactions via Electrophilic Activation Peer-reviewed

    Daisuke Uraguchi, Masahiro Terada

    Journal of the American Chemical Society 126 (17) 5356-5357 2004/05/05

    DOI: 10.1021/ja0491533  

    ISSN: 0002-7863

  210. "Asymmetric" catalysis by lanthanide complexes Peer-reviewed

    Koichi Mikami, Masahiro Terada, Hiroshi Matsuzawa

    Angewandte Chemie - International Edition 41 (19) 3554-3572 2002/10/04

    DOI: 10.1002/1521-3773(20021004)41:19<3554::aid-anie3554>3.0.co;2-p  

    ISSN: 1433-7851

  211. Highly enantioselective palladium-catalyzed ene-type cyclization of a 1,6-enyne Peer-reviewed

    Manabu Hatano, Masahiro Terada, Koichi Mikami

    Angewandte Chemie - International Edition 40 (1) 249-253 2001/01/08

    DOI: 10.1002/1521-3773(20010105)40:1<249::AID-ANIE249>3.0.CO;2-X  

    ISSN: 1433-7851

  212. Dynamic Chirality Control of (Xyl-)BIPHEP Ligands Leading to their Diastereomerically Pure Ru Complexes with a Chiral N-Substituted DPEN

    Toshinobu Korenaga, Kohsuke Aikawa, Masahiro Terada, Susumu Kawauchi, Koichi Mikami

    Advanced Synthesis and Catalysis 343 (3) 284-288 2001

    DOI: 10.1002/1615-4169(20010330)343:3<284::AID-ADSC284>3.0.CO;2-L  

    ISSN: 1615-4150

  213. Racemic catalysis through asymmetric activation

    Koichi Mikami, Toshinobu Korenaga, Yousuke Matsumoto, Makoto Ueki, Masahiro Terada, Satoru Matsukawa

    Pure and Applied Chemistry 73 (2) 255-259 2001

    DOI: 10.1351/pac200173020255  

    ISSN: 0033-4545

  214. Tetranuclear titanium 7,7′-modified binaphtholate cluster as a novel chiral Lewis acid catalyst

    Koichi Mikami, Makoto Ueki, Yousuke Matsumoto, Masahiro Terada

    Chirality 13 (9) 541-544 2001

    DOI: 10.1002/chir.1174  

    ISSN: 0899-0042

  215. Asymmetric activation Peer-reviewed

    Koichi Mikami, Masahiro Terada, Toshinobu Korenaga, Yousuke Matsumoto, Makoto Ueki, Rémy Angelaud

    Angewandte Chemie - International Edition 39 (20) 3532-3556 2000/10/16

    DOI: 10.1002/1521-3773(20001016)39:20<3532::AID-ANIE3532>3.0.CO;2-L  

    ISSN: 1433-7851

    eISSN: 1521-3773

  216. Catalytic asymmetric syntheses and biological activities of singly dehydroxylated 19-nor-1α,25-dihydroxyvitamin D<inf>3</inf> A-ring analogs in cancer cell differentiation and apoptosis

    Toshio Okano, Kimie Nakagawa, Noboru Kubodera, Keiichi Ozono, Akira Isaka, Ayako Osawa, Masahiro Terada, Koichi Mikami

    Chemistry and Biology 7 (3) 173-184 2000/03/01

    DOI: 10.1016/S1074-5521(00)00087-9  

    ISSN: 1074-5521

  217. Diastereomer liquid crystalline CF<inf>3</inf> molecules: conformational probe for (anti)ferroelectricity and spontaneous resolution of the racemates

    Koichi Mikami, Tomoko Yajima, Jun Kojima, Masahiro Terada, Susumu Kawauchi, Hiroko Shirasaki, Kenji Okuyama, Yoshiichi Suzuki, Ichiro Kobayashi, Yoichi Takanishi, Hideo Takezoe

    Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 346 41-49 2000

    DOI: 10.1080/10587250008023864  

    ISSN: 1058-725X

  218. Molecular assembly of BINOL-Ti complexes into an active μ<inf>3</inf>-oxo titanium catalyst

    Masahiro Terada, Yousuke Matsumoto, Yoshiyuki Nakamura, Koichi Mikami

    Inorganica Chimica Acta 296 (1) 267-272 1999/12/15

    DOI: 10.1016/S0020-1693(99)00370-9  

    ISSN: 0020-1693

  219. Spontaneous enantiomeric resolution in a fluid smectic phase of a racemate

    Yoichi Takanishi, Hideo Takezoe, Yoshiichi Suzuki, Ichiro Kobayashi, Tomoko Yajima, Masahiro Terada, Koichi Mikami

    Angewandte Chemie - International Edition 38 (16) 2353-2356 1999/08/12

    DOI: 10.1002/(sici)1521-3773(19990816)38:16<2353::aid-anie2353>3.0.co;2-f  

    ISSN: 1433-7851

  220. Conformationally flexible biphenylphosphane ligands for Ru-catalyzed enantioselective hydrogenation

    Koichi Mikami, Toshinobu Korenaga, Masahiro Terada, Takeshi Ohkuma, Trang Pham, Ryoji Noyori

    Angewandte Chemie - International Edition 38 (4) 495-497 1999/02/15

    DOI: 10.1002/(SICI)1521-3773(19990215)38:4<495::AID-ANIE495>3.0.CO;2-O  

    ISSN: 1433-7851

  221. Spontataneous Optical Enantiomeric Resolution in a Smectic Phase of Double-stereogenic Racmic Compounds

    TAKANISHI Yoichi, TAKEZOE Hideo, KOBAYASHI Ichiro, SUZUKI Yoshi-ichi, YAJIMA Tomoko, TERADA Masahiro, MIKAMI Koichi

    Proceedings of Japanese Liquid Crystal Society Annual meeting 1999 322-323 1999

    Publisher: Japanese Liquid Crystal Society

    DOI: 10.11538/ekitou.1999.0_322  

    More details Close

    Just 150 years ago, Pasteur found by optical microscopy that crystals of a sodium ammonium salt of "acide racemique" were spontaneously resolved into two enantiomorphos forms. In spite of extensive effort, no one has succeeded in observing the same phenomenon in a fluid state because of the thermal fluctuation and diffusion. We report spontaneous chiral optical resolution in a fluid system of a racemic diastereomer, (R,S)-β-Me-TFMHPOBC. In a homogeneous cell, the smectic liquid crystal of the racemate of diastereomeric molecules was found to exhibit an electrooptic response and a bistable domain switching in the SmC-like phase, although no macroscopic dipole is expected to exist. Moreover, the homeotropic cells of this material exhibit striped domains. The striped domains are associated with fine stripes having two opposite tilt senses with respect to the predominant stripes, indicating the co-existence of right- and left- handed homo-chiral domains.

  222. Tandem (domino) and two-directional asymmetric catalysis of carbonyl-ene reaction with fluoral: Fluoral-ene approach to modeling of inter-smectic layer interaction of antiferroelectric liquid crystals

    Koichi Mikami, Tomoko Yajima, Nasakul Siree, Masahiro Terada, Yoshiichi Suzuki, Yoichi Takanishi, Hideo Takezoe

    Synlett (12) 1895-1898 1999

    DOI: 10.1055/s-1999-2990  

    ISSN: 0936-5214

  223. BINOL-Ti-Catalyzed carbonyl-ene cyclization by tuning the 6-Br-ligand for the synthesis of 2-methyl-19-nor-22-oxa vitamin D analogue with significant differentiation activity

    Koichi Mikami, Yurika Koizumi, Ayako Osawa, Masahiro Terada, Hiroaki Takayama, Kimie Nakagawa, Toshio Okano

    Synlett (12) 1899-1902 1999

    DOI: 10.1055/s-1999-2989  

    ISSN: 0936-5214

  224. Erratum: Highly efficient and practical optical resolution of 2-amino- 2'hydroxy-1,1'-binaphthyl by molecular complexation with N-benzylcinchonidium chloride: A direct transformation to binaphthyl amino phosphine (Chemistry - A European Journal (1999) 5 (1734-1737))

    K. Ding, Y. Wang, H. Yun, J. Liu, Y. Wu, M. Terada, Y. Okubo, K. Mikami

    Chemistry - A European Journal 5 (8) 2223 1999

    ISSN: 0947-6539

  225. Catalytic C-H bond activation-asymmetric olefin coupling reaction: The first example of asymmetric Fujiwara-Moritani reaction catalyzed by chiral palladium(II) complexes 1

    Koichi Mikami, Manabu Hatano, Masahiro Terada

    Chemistry Letters (1) 55-56 1999

    DOI: 10.1246/cl.1999.55  

    ISSN: 0366-7022

  226. Effects of Conformation of Diastereomer Liquid Crystals on the Preference of Antiferroelectricity

    Ichiro Kobayashi, Shigeharu Hashimoto, Yoshiichi Suzuki, Tomoko Yajima, Susumu Kawauchi, Tatsuya Imase, Masahiro Terada, Koichi Mikami

    Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 328 131-137 1999

    DOI: 10.1080/10587259908026053  

    ISSN: 1058-725X

  227. Highly efficient and practical optical resolution of 2-amino-2'-hydroxy- 1,1'-binaphthyl by molecular complexation with N-benzylcinchonidium chloride: A direct transformation to binaphthyl amino phosphine

    Kuiling Ding, Yang Wang, Hongying Yun, Jinxia Liu, Yangjie Wu, Masahiro Terada, Yasutaka Okubo, Koichi Mikami

    Chemistry - A European Journal 5 (6) 1734-1737 1999

    DOI: 10.1002/(SICI)1521-3765(19990604)5:6<1734::AID-CHEM1734>3.0.CO;2-G  

    ISSN: 0947-6539

  228. The effect of counter cations in zeolites on the efficient preparation of the binaphthol-titanium complex

    Masahiro Terada, Yousuke Matsumoto, Yoshiyuki Nakamura, Koichi Mikami

    Journal of Molecular Catalysis A: Chemical 132 (2-3) 165-169 1998/06/15

    DOI: 10.1016/S1381-1169(97)00239-2  

    ISSN: 1381-1169

  229. "Symmetry" in the synthesis of the A-ring of a vitamin D hybrid analogue with significant transactivation activity: A combinatorial sequence of regioselective propiolate-ene, catalytic enantioselective epoxidation and carbonyl-ene cyclization reactions

    Koichi Mikami, Ayako Osawa, Akira Isaka, Eiji Sawa, Masaki Shimizu, Masahiro Terada, Noboru Kubodera, Kimie Nakagawa, Naoko Tsugawa, Toshio Okano

    Tetrahedron Letters 39 (21) 3359-3362 1998/05/21

    DOI: 10.1016/S0040-4039(98)00272-X  

    ISSN: 0040-4039

  230. Efficient preparation of binaphthol-derived active μ<inf>3</inf>-oxo titanium catalyst by using hydrated Na-zeolites (molecular sieves)

    Koichi Mikami, Masahiro Terada, Yousuke Matsumoto, Masako Tanaka, Yoshiyuki Nakamura

    Microporous and Mesoporous Materials 21 (4-6) 461-466 1998/05

    DOI: 10.1016/S1387-1811(98)00022-5  

    ISSN: 1387-1811

  231. ジアステレオマー型反強誘電性液晶の結晶構造

    白崎 弘子, 野口 恵一, 奥山 健二, 矢島 知子, 寺田 眞浩, 三上 幸一, 小林 一郎, 鈴木 義一, 河村 一朗

    日本結晶学会誌 40 71-71 1998

    Publisher: The Crystallographic Society of Japan

    DOI: 10.5940/jcrsj.40.Supplement_71  

    ISSN: 0369-4585

  232. Asymmetric activation of chiral BINOL-zirconium catalysts: Effect of a product-like activator

    Thorsten Volk, Toshinobu Korenaga, Satoru Matsukawa, Masahiro Terada, Koichi Mikami

    Chirality 10 (7) 717-721 1998

    DOI: 10.1002/(SICI)1520-636X(1998)10:7<717::AID-CHIR19>3.0.CO;2-2  

    ISSN: 0899-0042

  233. Singly dehydroxylated A-ring analogues of 19-nor-1α,25- dihydroxyvitamin D<inf>3</inf> and 19-nor-22-oxa-1α,25-dihydroxyvitamin D<inf>3</inf>: Novel vitamin D<inf>3</inf> analogues with potent transcriptional activity but extremely low affinity for vitamin D receptor

    Toshio Okano, Kimie Nakagawa, Naoko Tsugawa, Keiichi Ozono, Noboru Kubodera, Ayako Osawa, Masahiro Terada, Koichi Mikami

    Biological and Pharmaceutical Bulletin 21 (12) 1300-1305 1998

    DOI: 10.1248/bpb.21.1300  

    ISSN: 0918-6158

  234. Asymmetric Catalysts for Polymerization

    MIKAMI Koichi, TERADA Masahiro, OSAWA Ayako

    Kobunshi 46 (2) 72-76 1997/02

    Publisher: The Society of Polymer Science, Japan

    DOI: 10.1295/kobunshi.46.72  

    ISSN: 0454-1138

  235. Anomalous role of molecular sieves 4A in the preparation of a binaphthol-derived active μ<inf>3</inf>-oxo titanium catalyst

    Masahiro Terada, Yousuke Matsumoto, Yoshiyuki Nakamura, Koichi Mikami

    Chemical Communications (3) 281-282 1997

    DOI: 10.1039/a607036a  

    ISSN: 1359-7345

  236. Diastereomer effects on antiferroelectricity and ferroelectricity of the newly synthesized liquid crystals

    Ichiro Kobayashi, Yoshiichi Suzuki, Tomoko Yajima, Susumu Kawauchi, Masahiro Terada, Koichi Mikami

    Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 303 165-170 1997

    DOI: 10.1080/10587259708039421  

    ISSN: 1058-725X

  237. Self-Assembly of Several Components into a Highly Enantioselective Ti Catalyst for Carbonyl-Ene Reactions

    Koichi Mikami, Satoru Matsukawa, Thorsten Volk, Masahiro Terada

    Angewandte Chemie (International Edition in English) 36 (24) 2768-2771 1997

    DOI: 10.1002/anie.199727681  

    ISSN: 0570-0833

  238. Direct transition from S<inf>A</inf> to antiferroelectric, ferroelectric or unknown phases of diastereomeric liquid-crystalline molecules with varying enantiomeric purities

    Koichi Mikami, Tomoko Yajima, Masahiro Terada, Yoshiichi Suzuki, Ichiro Kobayashi

    Chemical Communications (1) 57-58 1997

    DOI: 10.1039/a606162a  

    ISSN: 1359-7345

  239. Binaphthol-Titanium Complex-Catalyzed Fluoral-Ene Reaction with Vinyl Sulfides for Asymmetric Synthesis of Diastereomeric α-Trifluoromethyl-β-methyl Carbinols: Diastereomer Switch of Antiferroelectric or Ferroelectric Properties of Diastereomeric Liquid-Crystalline Systems

    Koichi Mikami, Tomoko Yajima, Nasakul Siree, Masahiro Terada, Yoshiichi Suzuki, Ichiro Kobayashi

    Synlett 1996 (9) 837-838 1996

    DOI: 10.1055/s-1996-5630  

    ISSN: 0936-5214

  240. Diastereotropic phenomena for the appearance of SmCA* phase in α-trifluoromethyl-β-methyl-substituted liquid crystalline molecules

    Koichi Mikami, Tomoko Yajima, Masahiro Terada, Susumu Kawauchi, Yoshiichi Suzuki, Ichiro Kobayashi

    Chemistry Letters (10) 861-862 1996

    DOI: 10.1246/cl.1996.861  

    ISSN: 0366-7022

  241. Asymmetric catalysis of carbonyl-ene and aldol reactions with fluoral by chiral binaphthol-derived titanium complex

    Koichi Mikami, Tomoko Yajima, Tsuyoshi Takasaki, Satoru Matsukawa, Masahiro Terada, Tadafumi Uchimaru, Masamichi Maruta

    Tetrahedron 52 (1) 85-98 1996

    DOI: 10.1016/0040-4020(95)00862-3  

    ISSN: 0040-4020

  242. Asymmetric catalysis of (Hetero) diels-alder cycloadditions by a modified binaphthol-derived titanium complex

    Yukihiro Motoyama, Masahiro Terada, Koichi Mikami

    Synlett 1995 (9) 967-968 1995/09

    DOI: 10.1055/s-1995-5138  

    ISSN: 0936-5214

    eISSN: 1437-2096

  243. Double Asymmetric Synthesis by Asymmetric Catalytic Carbonyl-Ene Type Reaction with Chiral Ene Components: Asymmetric Catalytic Synthesis of Aspartyl Dipeptide Sweetener

    Masahiro Terada, Noboru Sayo, Koichi Mikami

    Synlett 1995 (5) 411-414 1995/05

    DOI: 10.1002/chin.199539228  

    ISSN: 0936-5214

    eISSN: 1437-2096

  244. Periselective and enantioselective carbonyl-ene reaction of isoprene with fluoroalkyl glyoxylate catalysed by modified binaphthol-titanium complex: Asymmetric catalytic synthesis of enantiomerically pure ipsdienol

    Masahiro Terada, Koichi Mikami

    Journal of the Chemical Society, Chemical Communications (23) 2391-2392 1995

    DOI: 10.1039/C39950002391  

    ISSN: 0022-4936

  245. Diastereoselective and enantioselective glyoxylate-ene reaction catalyzed by new class of binaphthol-derived titanium complex

    Masahiro Terada, Yukihiro Motoyama, Koichi Mikami

    Tetrahedron Letters 35 (36) 6693-6696 1994/09/05

    DOI: 10.1016/S0040-4039(00)73470-8  

    ISSN: 0040-4039

  246. An europium(III) complex as an efficient catalyst for the Michael reaction of α,β-enones with ketene silyl acetals: LIS-NMR analysis for the transition state through complexation between europium(III) catalyst and enones

    Masahiro Terada, Takeshi Nakai, Koichi Mikami

    Inorganica Chimica Acta 222 (1-2) 377-380 1994/07

    DOI: 10.1016/0020-1693(94)03929-1  

    ISSN: 0020-1693

  247. Designed binaphthyl-derived titanium complexes: a new type of asymmetric catalyst for the carbonyl-ene reaction with glyoxylate

    Koichi Mikami, Yukihiro Motoyama, Masahiro Terada

    Inorganica Chimica Acta 222 (1-2) 71-75 1994/07

    DOI: 10.1016/0020-1693(94)03895-3  

    ISSN: 0020-1693

  248. Diastereoselective and enantioselective catalysis of the carbonyl-ene reaction with fluoral

    Koichi Mikami, Tomoko Yajima, Masahiro Terada, Etsuko Kato, Masamichi Maruta

    Tetrahedron: Asymmetry 5 (6) 1087-1090 1994/06

    DOI: 10.1016/0957-4166(94)80058-8  

    ISSN: 0957-4166

    eISSN: 1362-511X

  249. Asymmetric Catalysis of Diels-Alder Cycloadditions by an MS-Free Binaphthol-Titanium Complex: Dramatic Effect of MS, Linear vs Positive Nonlinear Relationship, and Synthetic Applications

    Koichi Mikami, Yukihiro Motoyama, Masahiro Terada

    Journal of the American Chemical Society 116 (7) 2812-2820 1994/04

    DOI: 10.1021/ja00086a014  

    ISSN: 0002-7863

    eISSN: 1520-5126

  250. Binaphthol-derived titanium μ-oxo complex: A new type of asymmetric catalyst for carbonyl-ene reaction with glyoxylate

    Masahiro Terada, Koichi Mikami

    Journal of the Chemical Society, Chemical Communications (7) 833-834 1994

    DOI: 10.1039/C39940000833  

    ISSN: 0022-4936

  251. Asymmetric catalysis of ene-type reaction with fluoral by chiral titanium complex: A semi-empirical and ab-initio analysis of ene reactivity

    Koichi Mikami, Tomoko Yajima, Masahiro Terada, Tadafumi Uchimaru

    Tetrahedron Letters 34 (47) 7591-7594 1993/11/19

    DOI: 10.1016/S0040-4039(00)60408-2  

    ISSN: 0040-4039

  252. Enantio- and diastereoselective catalysis of addition reaction of allylic silanes and stannanes to glyoxylates by binaphthol-derived titanium complex

    Seiichi Aoki, Koichi Mikami, Masahiro Terada, Takeshi Nakai

    Tetrahedron 49 (9) 1783-1792 1993/02/26

    DOI: 10.1016/S0040-4020(01)80535-4  

    ISSN: 0040-4020

  253. Control of chelation/nonchelation stereoselections in lanthanide-catalysed aldol reactions

    Koichi Mikami, Masahiro Terada, Takeshi Nakai

    Journal of the Chemical Society, Chemical Communications (4) 343-345 1993

    DOI: 10.1039/C39930000343  

    ISSN: 0022-4936

  254. Enantiomerically pure compound synthesis by asymmetric glyoxylate-ene reaction with vinylic sulfides and selenides catalysed by a chiral titanium complex

    Masahiro Terada, Satoru Matsukawa, Koichi Mikami

    Journal of the Chemical Society, Chemical Communications (3) 327-328 1993

    DOI: 10.1039/C39930000327  

    ISSN: 0022-4936

  255. Additions and Corrections: Asymmetric Desymmetrization by Enantioselective Catalysis of Carbonyl-Ene Reaction: Remote Internal Asymmetric Induction (Journal of the American Chemical Society (1992) 116(14) (6566–6568) (10.1021/ja00042a051))

    Koichi Mikami, Satoshi Narisawa, Masaki Shimizu, Masahiro Terada

    Journal of the American Chemical Society 114 (23) 9242 1992/11/01

    DOI: 10.1021/ja00049a100  

    ISSN: 0002-7863

    eISSN: 1520-5126

  256. Unique Stereocontrol in Europium (III)-Catalyzed Cyanosilylation of Chiral α-Alkoxy and α-Amino Aldehydes

    GU Jin-Hua, OKAMOTO Mikako, TERADA Masahiro, MIKAMI Koichi, NAKAI Takeshi

    Chemistry Letters 1992 (7) 1169-1172 1992/07/05

    Publisher: The Chemical Society of Japan

    DOI: 10.1246/cl.1992.1169  

    ISSN: 0366-7022

    More details Close

    The Eu(III)-catalyzed cyanosilylations of chiral α-alkoxy and α-amino aldehydes are shown to exhibit syn diastereofacial selection, the degree increasing with an increase in steric bulk of the alkyl chain in the aldehydes. The mechanism of this catalytic process is discussed.

  257. Chiral titanium complex-catalyzed carbonyl-ene reaction with glyoxylate: Remarkable positive nonlinear effect

    Koichi Mikami, Masahiro Terada

    Tetrahedron 48 (27) 5671-5680 1992/07/03

    DOI: 10.1016/0040-4020(92)80018-B  

    ISSN: 0040-4020

  258. Asymmetric Desymmetrization by Enantioselective Catalysis of Carbonyl-Ene Reaction: Remote Internal Asymmetric Induction

    Koichi Mikami, Satoshi Narisawa, Masaki Shimizu, Masahiro Terada

    Journal of the American Chemical Society 114 (16) 6566-6568 1992/07/01

    DOI: 10.1021/ja00042a051  

    ISSN: 0002-7863

    eISSN: 1520-5126

  259. Asymmetric catalysis for carbonyl-ene reaction

    Koichi Mikami, Masahiro Terada, Satoshi Narisawa, Takeshi Nakai

    Synlett 1992 (4) 255-265 1992/04

    DOI: 10.1055/s-1992-21333  

    ISSN: 0936-5214

    eISSN: 1437-2096

  260. Unique stereocontrol in lanthanide(III)-catalyzed aldol reactions with the ketene silyl acetal of methyl (R)-3-hydroxybutanoate

    Jin Hua Gu, Masahiro Terada, Koichi Mikami, Takeshi Nakai

    Tetrahedron Letters 33 (11) 1465-1468 1992/03/10

    DOI: 10.1016/S0040-4039(00)91648-4  

    ISSN: 0040-4039

  261. Stereo-Mudulating Catalysis by Enropium(III) Complexes in Aldol Reactions of Chiral α-Alkoxy Aldehydes with Ketene Silyl Acetals

    TERADA Masahiro, GU-Jin-Hua, DEKA Dibakar C, MIKAMI Koichi, NAKAI Takeshi

    Chemistry Letters 1992 (1) 29-32 1992/01/05

    Publisher: The Chemical Society of Japan

    DOI: 10.1246/cl.1992.29  

    ISSN: 0366-7022

    More details Close

    The Eu(fod)3- or Eu(dppm)3-catalyzed aldol reactions of the four chiral α-alkoxy aldehydes having different protecting groups with (E)- or (Z)-ketene silyl acetals are shown to provide the high levels of diastereocontrol, the sense depending on the nature of the protecting group. The catalytic stereo-modulation is explained in terms of the mode of aldehyde/catalyst complexation (chelation vs. nonchelation).

  262. Asymmetric catalysis by chiral titanium perchlorate for carbonyl-ene cyclization

    Koichi Mikami, Masahiro Terada, Eiji Sawa, Takeshi Nakai

    Tetrahedron Letters 32 (45) 6571-6574 1991/11/04

    DOI: 10.1016/0040-4039(91)80224-T  

    ISSN: 0040-4039

  263. Unique Catalysis by Eu(dppm)<inf>3</inf>: Catalytic Molecular Recognition in Aldol and Michael Reactions

    Koichi Mikami, Masahiro Terada, Takeshi Nakai

    Journal of Organic Chemistry 56 (18) 5456-5459 1991/08/01

    DOI: 10.1021/jo00018a049  

    ISSN: 0022-3263

    eISSN: 1520-6904

  264. Enantioselective Hetero-Diels-Alder reaction with glyoxylate catalyzed by chiral titanium complex: asymmetric synthesis of the lactone portion of mevinolin and compactin

    Masahiro Terada, Koichi Mikami, Takeshi Nakai

    Tetrahedron Letters 32 (7) 935-938 1991/02/11

    DOI: 10.1016/S0040-4039(00)92124-5  

    ISSN: 0040-4039

  265. Chiral titanium complex-catalyzed Diels-Alder reaction: A practical route to anthracycline intermediates

    Koichi Mikami, Masahiro Terada, Yukihiro Motoyama, Takeshi Nakai

    Tetrahedron: Asymmetry 2 (7) 643-646 1991

    DOI: 10.1016/S0957-4166(00)86118-2  

    ISSN: 0957-4166

    eISSN: 1362-511X

  266. Lanthanide(III) catalyzed aldol reactions of glyceraldehyde acetonide with ketene silyl acetals: Catalytic asymmetric route to monosaccharides

    Koichi Mikam, Masahiro Terada, Takeshi Nakai

    Tetrahedron: Asymmetry 2 (10) 993-996 1991

    DOI: 10.1016/S0957-4166(00)86145-5  

    ISSN: 0957-4166

    eISSN: 1362-511X

  267. Asymmetric catalysis by chiral titanium perchlorate for carbonyl-ene cyclization

    Koichi Mikami, Eiji Sawa, Masahiro Terada

    Tetrahedron: Asymmetry 2 (12) 1403-1412 1991

    DOI: 10.1016/S0957-4166(00)80036-1  

    ISSN: 0957-4166

    eISSN: 1362-511X

  268. Efficient Use of Early Transition Metal, Titanium: Highly Selective Titanium Reagents

    Koichi Mikami, Masahiro Terada, Takeshi Nakai

    Journal of Synthetic Organic Chemistry, Japan 49 (6) 566-574 1991

    DOI: 10.5059/yukigoseikyokaishi.49.566  

    ISSN: 0037-9980

  269. "Chemzyme" for Carbonyl-Ene Reactions

    MIKAMI Koichi, TERADA Masahiro, NAKAI Takeshi

    Journal of Japan Oil Chemists' Society 39 (10) 837-845 1990

    Publisher: Japan Oil Chemists' Society

    DOI: 10.5650/jos1956.39.10_837  

    ISSN: 1884-2003

    More details Close

    A chemist-made asymmetric catalyst ("chemzyme") for abiological transformations could be complementary to a god-made asymmetric catalyst (enzyme) for biological transformations. Thus, the development of asymmetric catalysis for abiogenetic-type reactions, carbon-carbon bond formations in particular, is the most challenging and formidable endeavor for synthetic organic chemists. Described herein is the development of the chiral titanium catalyst, prepared in the presence of molecular sieves (MS 4 A), for the enantiocontrol in carbonyl-ene reactions. The specific role of MS (zeolite), "positive" nonlinear effect, and the asymmetric catalyst-based diastereocontrol (double asymmetric induction and kinetic resolution) are also detailed.

  270. Aminoaldehyde-ene reaction: Stereoselective route to β-amino alcohols

    Mikami Koichi, Kaneko Masami, Loh Teck-Peng, Terada Masahiro, Nakai Takeshi

    Tetrahedron Letters 31 (27) 3909-3912 1990

    DOI: 10.1016/S0040-4039(00)97503-8  

    ISSN: 0040-4039

  271. Catalytic Asymmetric Glyoxylate–Ene Reaction: A Practical Access to α-Hydroxy Esters in High Enantiomeric Purities

    Koichi Mikami, Masahiro Terada, Takeshi Nakai

    Journal of the American Chemical Society 112 (10) 3949-3954 1990

    DOI: 10.1021/ja00166a035  

    ISSN: 0002-7863

    eISSN: 1520-5126

  272. Carbonyl-Ene Reaction: An Emerging Tool for Acyclic Stereocontrol

    Koichi Mikam, Masahiro Terada, Masaki Shimizu, Takeshi Nakai

    Journal of Synthetic Organic Chemistry, Japan 48 (4) 292-303 1990

    DOI: 10.5059/yukigoseikyokaishi.48.292  

    ISSN: 0037-9980

  273. Remarkable positive nonlinear effect in the enantioselective glyoxylate-ene reaction catalysed by a chiral titanium complex

    Masahiro Terada, Koichi Mikami, Takeshi Nakai

    Journal of the Chemical Society, Chemical Communications (22) 1623-1624 1990

    DOI: 10.1039/C39900001623  

    ISSN: 0022-4936

  274. Asymmetric Glyoxylate—Ene Reaction Catalyzed by Chiral Titanium Complexes: A Practical Access to α-Hydroxy Esters in High Enantiomeric Purities

    Kōichi Mikami, Masahiro Terada, Takeshi Nakai

    Journal of the American Chemical Society 111 (5) 1940-1941 1989/03/01

    DOI: 10.1021/ja00187a093  

    ISSN: 0002-7863

    eISSN: 1520-5126

Show all ︎Show first 5

Misc. 41

  1. Development of molecular transformations on the basis of catalytic generation of anionic species by organosuperbase

    Azusa Kondoh, Masahiro Terada

    Bulletin of the Chemical Society of Japan 94 (1) 339-356 2021

    DOI: 10.1246/BCSJ.20200308  

    ISSN: 0009-2673

    eISSN: 1348-0634

  2. Enantioconvergent Substitution Reactions of Racemic Electrophiles by Organocatalysis International-journal

    Jun Kikuchi, Masahiro Terada

    Chemistry - A European Journal 2021

    DOI: 10.1002/chem.202100439  

    ISSN: 0947-6539

    eISSN: 1521-3765

  3. Recent topics on synthesis of π-extended polycycles by cascade annulations

    Tienan Jin, Masahiro Terada

    Tetrahedron Letters 61 (8) 2020/02/20

    DOI: 10.1016/j.tetlet.2019.151514  

    ISSN: 0040-4039

    eISSN: 1873-3581

  4. Catalytic Performance of Nanoporous Metal Skeleton Catalysts for Molecular Transformations

    Tienan Jin, Masahiro Terada, Ming Bao, Yoshinori Yamamoto

    ChemSusChem 12 (13) 2936-2954 2019/07/05

    DOI: 10.1002/cssc.201900318  

    ISSN: 1864-5631

    eISSN: 1864-564X

  5. Recent progress on catalytic [1,3]-oxygen rearrangement reactions from nitrogen to carbon atoms

    Itaru Nakamura, Masahiro Terada

    Tetrahedron Letters 60 (10) 689-698 2019/03/07

    DOI: 10.1016/j.tetlet.2019.01.057  

    ISSN: 0040-4039

    eISSN: 1873-3581

  6. Novel transformations utilizing [1, 2]-phospha-brook rearrangement under bronsted base catalysis

    Azusa Kondoh, Masahiro Terada

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry 76 (2) 151-163 2018

    DOI: 10.5059/yukigoseikyokaishi.76.151  

    ISSN: 0037-9980

  7. Enantioselective Addition Reactions Realized by Chiral Organosuperbase Catalyst

    46 (3) 29-34 2017/03

    Publisher: シーエムシー出版

    ISSN: 0913-6150

  8. Synthesis of indolizine derivatives utilizing [1,2]-phospha-brook rearrangement/cycloisomerization sequence

    Azusa Kondoh, Kazumi Koda, Yuji Kamata, Masahiro Terada

    Chemistry Letters 46 (7) 1020-1023 2017

    DOI: 10.1246/cl.170377  

    ISSN: 0366-7022

    eISSN: 1348-0715

  9. キラルブレンステッド酸触媒並びに塩基触媒の設計開発 (特集 持続可能社会に向けて進化する有機分子触媒)

    寺田 眞浩

    化学と工業 = Chemistry & chemical industry 67 (6) 474-476 2014/06

    Publisher: 日本化学会

    ISSN: 0022-7684

  10. Heterocyclic synthesis by π-acidic metal catalyzed reactions via n-o bond cleavage

    Itaru Nakamura, Masahiro Terada

    Heterocycles 89 (4) 845-868 2014

    DOI: 10.3987/REV-13-791  

    ISSN: 0385-5414

    eISSN: 1881-0942

  11. NMR法を用いたリチウムイオン内包フラーレンの分析

    笠間 泰彦, 河地 和彦, 吉田 慎一朗, 權 垠相, 浅尾 直樹, 寺田 眞浩

    NanotechJapan Bulletin 7 (4) 27-1-27-7 2014

    Publisher: 文部科学省「ナノテクノロジープラットフォーム」

  12. Enantioselective Transformations Catalyzed by Chiral Bronsted Acids

    Masahiro Terada

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN 71 (5) 480-490 2013/05

    DOI: 10.5059/yukigoseikyokaishi.71.480  

    ISSN: 0037-9980

  13. Enantioselective transformations catalyzed by chiral Brønsted acids

    Masahiro Terada

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry 71 (5) 480-490 2013

    Publisher: The Society of Synthetic Organic Chemistry, Japan

    DOI: 10.5059/yukigoseikyokaishi.71.480  

    ISSN: 0037-9980

  14. Ene Reactions

    M. Terada

    Science of Synthesis, Stereoselective Synthesis 3 3 309-346 2011/04

    Publisher: Thieme

  15. Axially chiral guanidines as efficient brønsted base catalysts for enantioselective transformations

    Masahiro Terada

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry 68 (11) 1159-1168 2010/11

    DOI: 10.5059/yukigoseikyokaishi.68.1159  

    ISSN: 0037-9980

  16. Development of Axially Chiral Guanidine Base Catalysts on the Basis of Hydrogen Bonds as Key Interactions

    TERADA MASAHIRO

    52 (7) 490-496 2010/10/10

    Publisher: 触媒学会

    ISSN: 0559-8958

  17. Enantioselective transformations catalyzed by Chiral Bronsted acids

    Masahiro Terada

    ファインケミカル 39 (8) 10-21 2010/08

    Publisher: シーエムシー出版

    ISSN: 0913-6150

  18. Chiral phosphoric acids as versatile catalysts for enantioselective carbon-carbon bond forming reactions

    Masahiro Terada

    Bulletin of the Chemical Society of Japan 83 (2) 101-119 2010

    DOI: 10.1246/bcsj.20090268  

    ISSN: 0009-2673

    eISSN: 1348-0634

  19. Chiral phosphoric acids as versatile catalysts for enantioselective transformations

    Masahiro Terada

    Synthesis 2010 (12) 1929-1982 2010

    DOI: 10.1055/s-0029-1218801  

    ISSN: 0039-7881

    eISSN: 1437-210X

  20. キラルブレンステッド酸触媒-どこまで使いこなせるようになるか-

    M. Terada

    進化を続ける有機触媒~日本の最先端と世界の動向~ 105-117 2009/07

    Publisher: 化学同人

  21. Development of organocatalysts based on hydrogen bonds as key interaction: enantioselective transformations by chiral Bronsted acid catalysts

    M. Terada

    化学工業 60 (7) 498-505 2009/07

    Publisher: 化学工業社

    ISSN: 0451-2014

  22. Binaphthol-derived phosphoric acid as a versatile catalyst for enantioselective carbon-carbon bond forming reactions

    Masahiro Terada

    Chemical Communications (35) 4097-4112 2008

    DOI: 10.1039/b807577h  

    ISSN: 1359-7345

    eISSN: 1364-548X

  23. キラルブレンステッド酸による不斉触媒反応:水素結合を鍵とする有機分子の活性化

    M. Terada

    化学と工業 60 (11) 1080-1083 2007/11/01

    Publisher: 日本化学会

    ISSN: 0022-7684

  24. Highly enantioselective carbonyl-ene reaction catalyzed by chiral titanium complexes: Toward structural elucidation of catalytically active species

    Masahiro Terada

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry 65 (8) 748-760 2007/08

    DOI: 10.5059/yukigoseikyokaishi.65.748  

    ISSN: 0037-9980

  25. Asymmetric Catalysis by Chiral Bronsted Acids

    TERADA MASAHIRO

    48 (1) 38-43 2006/01/15

    Publisher: 触媒学会

    ISSN: 0559-8958

  26. 酸化的Mizoroki-Heck型反応:最近の展開

    寺田眞浩

    Organometallic News 39 (1) 21-21 2003/04

  27. Synthesis of 2-Fluoro-19-nor Vitamin D Analogues Based on Asymmetric Catalytic Carbonyl-Ene Cyclization.

    三上幸一, 大場志保, 大村浩文, 寺田真浩, 久保寺登, 中川公恵, 岡野登志男

    日本化学会講演予稿集 78th (2) 2000

    ISSN: 0285-7626

  28. 19-nor活性型ビタミンD3誘導体はA環水酸基立体特異的に細胞分化とアポトーシスを誘導する

    中川公恵, 岡野登志夫, 大沢綾子, 寺田真浩, 三上幸一, 大薗恵一

    ビタミン 74 (4) 2000

    ISSN: 0006-386X

  29. Enantiomer-selective activation of racemic catalysts

    Koichi Mikami, Masahiro Terada, Toshinobu Korenaga, Yousuke Matsumoto, Satoru Matsukawa

    Accounts of Chemical Research 33 (6) 391-401 2000

    DOI: 10.1021/ar9900818  

    ISSN: 0001-4842

  30. Design of Asymmetric Catalyst without Chiral Ligand

    寺田眞浩

    Catalysts & Catalysis 41 (5) 334-335 1999/05

  31. 19-nor1α, 25-dihydroxyvitamin D_3 A環ジアステレオマーの生物活性と作用機講

    中川公恵, 黒部 真由子, 岡野 登志夫, 大澤 綾子, 寺田 眞浩, 三上 幸一, 大薗 恵一

    ビタミン 73 279-279 1999

    Publisher: 日本ビタミン学会

    ISSN: 0006-386X

  32. Synthesis of 2-Methyl-19-norvitamin D Analogues Based on Asymmetric Catalytic Carbonyl-Ene Cyclizations.

    三上幸一, 小泉ゆりか, 大沢紋子, 寺田真浩, 久保寺登, 中川公恵, 岡野登志男

    日本化学会講演予稿集 76th (2) 1999

    ISSN: 0285-7626

  33. 6. ビタミンD誘導体の構造と活性 : A環誘導体を中心に (故小林正委員メモリアルシンポジウム)

    岡野 登志夫, 中川 公恵, 黒部 真由子, 大薗 恵一, 大澤 紋子, 寺田 真浩, 三上 孝一, 久保寺 登

    ビタミン 72 (8) 415-416 1998/08/25

    Publisher: 日本ビタミン学会

    ISSN: 0006-386X

  34. 不斉活性化による触媒的不斉合成--ラセミ触媒を叱るより誉めて長所を伸ばす

    三上 幸一, 是永 敏伸, 寺田 真浩

    現代化学 (329) 14-21 1998/08

    Publisher: 東京化学同人

    ISSN: 0386-961X

  35. 19-Nor-vitamin D_3 誘導体の in vitro における生物活性と転写活性

    中川 公恵, 津川 尚子, 黒部 真由子, 大薗 恵一, 大澤 紋子, 寺田 真浩, 三上 幸一, 久保寺 登, 岡野 登志夫

    日本骨代謝学会雑誌 = Japanese journal of bone metabolism 16 (2) 278-278 1998/07/07

    ISSN: 0910-0067

  36. Asymmetric activation of racemic ruthenium(II) complexes for enantioselective hydrogenation [9]

    T. Ohkuma, H. Doucet, T. Pham, K. Mikami, T. Korenaga, M. Terada, R. Noyori

    Journal of the American Chemical Society 120 (5) 1086-1087 1998/02/11

    DOI: 10.1021/ja972897e  

    ISSN: 0002-7863

  37. Biological activities of D3 derivative of 19-nor-vitamin with hydroxyl group in 1 or 3 position of A ring.

    中川公恵, 津川尚子, 岡野登志夫, 大薗恵一, 大沢紋子, 寺田真浩, 三上幸一, 久保寺登

    日本薬学会年会要旨集 118th (3) 1998

    ISSN: 0918-9823

  38. Synthesis of Hybrid Type Vitamin D Analogues Based on the Asymmetric Catalytic Carbonyl-Ene Cyclization.

    三上幸一, 大沢紋子, 寺田真浩, 久保寺登, 中川公恵, 岡野登志夫

    日本化学会講演予稿集 74th (2) 1998

    ISSN: 0285-7626

  39. Asymmetric Activation of Racemic Catalysts

    Koichi Mikami, Toshinobu Korenaga, Satoru Matsukawa, Yousuke Matsumoto, Kuiling Ding, Akihiro Ishii, Thorsten Volk, Masahiro Terada

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry 56 (11) 975-986 1998

    DOI: 10.5059/yukigoseikyokaishi.56.975  

    ISSN: 0037-9980

  40. キラルチタン錯体を触媒とする不斉合成

    三上 幸一, 寺田 真浩

    科学と工業 71 (7) 249-258 1997/07

    Publisher: 大阪工研協会

    ISSN: 0368-5918

  41. ビナフトール由来のキラルチタン錯体による向山アルドール反応の不斉触媒化

    三上幸一, 松川覚, 清水正毅, 寺田真浩

    日本化学会講演予稿集 65th (2) 1993

    ISSN: 0285-7626

Show all ︎Show first 5

Books and Other Publications 5

  1. Handbook on Lewis Acids-Application in Organic Synthesis Vol. 2

    K. Mikami, M. Terad

    Wiley-VCH 2000/10

  2. 触媒の事典

    寺田眞浩

    朝倉書店 2000/05

  3. Comprehensive Asymmetric Catalysis Vol. 3

    K. Mikami, M. Terada

    Springer 1999/10

  4. Lewis Acid Reagents: A Practical Approach

    K. Mikami, M. Terada

    Oxford University Press 1998/06

  5. Advances in Catalytic Processes, Vol. 1

    K. Mikami, M. Terada, T. Nakai

    JAI Press 1995/09

Research Projects 29

  1. 有機分子触媒による効率的物質変換反応の開発 Competitive

    System: Grant-in-Aid for Scientific Research

    2001/07 - Present

  2. Development of advanced molecular transformations based on innovative molecular design of higher order organosuperbase catalysts enabling molecular recognition

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (S)

    Institution: Tohoku University

    2022/04/27 - 2027/03/31

  3. Development of advanced molecular transformations based on innovative molecular design of higher order organosuperbase catalysts enabling molecular recognition

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2022/04/01 - 2025/03/31

  4. Development of efficient molecular transformation system using [metal complexes/chiral Br&oslash;nsted acids] hybrid catalysis

    TERADA Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Tohoku University

    2017/06/30 - 2022/03/31

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    In this research, we aimed to develop a two-component hybrid catalyst system that combines "selective molecular transformation using organocatalysts, especially chiral Bronsted acids", that the applicant has been involved in so far, with "a specific molecular transformation using a metal complex catalyst". In order to develop an efficient and selective method for the preparation of enantioenriched compounds that surpass conventional catalytic systems, we connected these catalytic systems in a relay manner in one-pot during the course of the substance conversion. We have successfully established several hybrid catalytic systems using chiral Bronsted acids combined not only with metal complexes but also with photoactivation system. In addition, we also achieved the development of a chiral Bronsted acid catalyst having a higher acidity than that of conventional chiral acids, which is the key to achieving a hybrid catalytic system.

  5. Development of Functional Organosuperbase Catalysts Enabling Molecular Recognition

    TERADA Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (S)

    Institution: Tohoku University

    2016/05/31 - 2021/03/31

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    Br&oslash;nsted bases have been extensively employed for activation of reactants having an acidic proton. Among these, organobases were commonly utilized as a reagent for molecular transformations, however applicable transformations have been quite limited because of these less basic properties. In recent years, intensive interest has been devoted to the development of organosuperbases, although little attention has been devoted to the catalytic use of these fascinating molecules. We focused on the utilization of these organosuperbase as a catalyst and the development of functional organosuperbase catalysts enabling molecular recognition, namely, chiral organosuperbases. The purpose of this research is that the design and synthesis of chiral organosuperbases, which have unprecedent and remarkable catalytic activity, high selectivity, and construction of catalyst-recycling system. As the result, we have successfully developed a new type of chiral organosuperbase catalysts.

  6. 有機分子触媒による未来型分子変換

    寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 新学術領域研究(研究領域提案型)

    Institution: 東北大学

    2016/04/01 - 2017/03/31

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    本領域研究が目的とする、持続可能な「モノづくり」の科学を発展させるための優れた有機分子触媒の開発、ならびに有機分子触媒を用いた効率的・革新的な触媒反応系を開拓し、有用物質の実践的な合成プロセスとして真に優れた分子変換を実現するため、以下の3つの研究項目「A01 有機分子触媒の制御システム設計開発(触媒開発)」「A02 有機触媒による分子変換システム開発(反応開発)」「A03 有機分子触媒による実践的有用物質合成(有用物質合成)」に携わる計画班員(研究代表者12名)を有機的・発展的な連携のもとで組織することによって強力に推進してきた。平成27年度に本新学術領域研究が終了したことを受け、平成28年度は取り纏めシンポジウムの開催、最終評価報告書の作成、成果報告書の作成などを行い、下記の11名の連携研究者(計画班・班員)とともに推進してきた本新学術領域研究の集大成とした。 連携研究者:「北 泰行 立命館大学・教授 A02班長:領域研究の企画担当」「林 雄二郎 東京理科大学・教授 A03班長:各研究項目の企画調整」「秋山 隆彦 学習院大学・教授 事務連絡担当」「竹本 佳司 京都大学・教授 広報担当ならびに各研究項目の企画調整」「浦口 大輔 名古屋大学・講師 A01班の研究計画における実験系を企画し、実施」「山中 正浩 立教大学・准教授 A01班の研究計画における理論系を企画し、実施」「川端 猛夫 京都大学・教授 A02班の研究計画における制御系を企画し、実施」「根東 義則 東北大学・教授 A02班の研究計画における分子構築を企画し、実施」「岩渕 好治 東北大学・教授 A03班の研究計画における分子構築を企画し、実施」「砂塚 敏明 北里大学・教授 A03班の研究計画における合成系を企画し、実施」「長澤 和夫 東京農工大学・教授 A03班の研究計画における制御系を企画し、実施」

  7. 基質認識型・超強塩基性有機分子触媒の創製

    寺田 眞浩, 近藤 梓

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 東北大学

    2016/04/01 - 2017/03/31

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    ホスファゼンはその単位構造であるイミノホスホランユニット(P=N構造)の連結数が増すごとに塩基性が向上する。この化学的特質に着目するとともに、イミノホスホランに効果的な基質認識能を付与するため、その両端にグアニジンもしくはホスファゼンユニットを二つ導入したC2対称性を有する触媒分子群、ならびに水素結合ドナーとなる酸性官能基と超強塩基性官能基とを組み合わせた酸塩基二官能基型の触媒分子群を「基質認識型・超強塩基性有機分子触媒」として設計開発することを計画した。 これまでの研究で擬C2対称性を有するスピロ環不斉ビス(グアニジノ)イミノホスホランの開発に成功し、超強塩基性を示す有機分子触媒として優れた機能を示すことを明らかにした。一方、スピロ環不斉P3ホスファゼンの基本骨格の合成にも成功し、これら超強塩基性有機分子触媒の各種誘導体の合成とそれらを用いた触媒反応系の開拓を主に検討した。 スピロ不斉ビス(グアニジノ)イミノホスホランを不斉触媒とする反応開発では、超強塩基性であるがゆえに、従来の有機塩基では活性化が困難であったプロ求核剤から活性種を発生させることに成功し、特にチオノラクトンをプロ求核剤としたケチミンとのMannich反応では高いエナンチオ選択性で生成物を得ることに成功し、スピロ不斉ビス(グアニジノ)イミノホスホランの基質認識型・超強塩基性有機分子触媒としての有用性を示すことができた。

  8. Development of bifunctional Organocatalysts Utilizing the Property of Ionic Organo-Functional Group

    TERADA Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2015/04/01 - 2017/03/31

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    During the past two decades, organocatalysts, the small organic molecule having catalytic activities, have emerged as an efficient catalyst for organic transformations. However catalytic activities and scope of reactions have still limited to establish practical methods using organocatalysts. In order to overcome these conventional issues, we focused our attention on the utilization of ionic organo-functional group in the catalyst design and this key functional group was embedded into the organocatalysts to achieve “unprecedented high catalytic activity”, “high stereoselectivity”, and “wide substrate scope”. The purpose of this study is the development of bifunctional organocatalysts having ionic organo-functional group as a key element for catalyst design to accomplish these high potentials as mentioned above.

  9. Development of Advanced Molecular Transformations by 'Organobase/Chiral Lewis Acid' Concerted Binary Catalytic System

    TERADA Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

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    The purpose of this study is the development of concerted binary catalytic system which combines activation of reactant by organobase and stereocontrol by chiral Lewis acid. The proposed system is aimed at the design of the chiral art complex to realize highly stereoselective transformations, where two type of catalytic system was investigated. 1) In the development of organobase/chiral metal phosphate salts concerted binary catalytic system, combination of organobase and alkaline earth metal or rare earth metal salts as a central metal species were investigated. 2) In the development of organobase/chiral Schiff base metal salt concerted binary catalytic system, combination of organobase and alkaline metal salts as a central metal species was investigated.

  10. Advanced Molecular Transformations by Development of Chiral Organosuperbase Catalysts

    TERADA Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2012/04/01 - 2016/03/31

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    The development of much stronger organobase is highly demanded to overcome intrinsic limitation of applicable pro-nucleophiles which have relatively acidic proton at the alpha-position, such as 1,3-dicarbonyl compounds and nitroalkanes. In general, the basicity of the organobases increases with increasing the resonance stability of their conjugate acids, the protonated form of the organobases. For instance, introduction of phosphazene or guanidine subunit(s) to the iminophosphorane core stabilizes its conjugate acid, aminophosphonium cation, to afford a series of phosphazene organosuperbases. However, the iminophosphorane modified by the additional phosphazene or guanidine subunit has never been applied to develop chiral organosuperbase so far. We hence designed a pseudo C2-symmetric P3-phosphazen and bis(guanidino)iminophosphorane as a novel family of chiral phosphazene organosuperbases and successfully developed these molecules.

  11. Development of Controlling System for Organocatalysts Based on the Formation of Hydrogen Bonding Network

    TERADA Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Tohoku University

    2011/04/01 - 2016/03/31

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    The development of highly selective and efficient organic transformation is highly demanded for organic synthesis. In order to establish such reaction system, we designed novel chiral Br&oslash;nsted acid catalysts which were introduced two or more acidic functional groups to the same catalyst molecule. The design concept of the new catalyst molecules is the formation of intramolecular hydrogen bond between two or more acidic moiety to enhance the acidity of the catalyst molecule. As the result, we successfully developed bis-phopsphoric acid catalyst of which two phosphoric acid moieties were introduced to the catalyst molecule. In addition, on the basis of the design concept of bis- phopsphoric acid catalyst, we further developed C1 symmetric bis-phosphoric acid catalyst to enhance the acidity of the catalyst molecule.

  12. Advanced Molecular Transformations by Organocatalysts

    TERADA Masahiro, AKIYAMA Takahiko, KITA Yasuyuki, TAKEMOTO Yoshiji, HAYASHI Yujiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Tohoku University

    2011/04/01 - 2016/03/31

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    To avoid using rare and depleted resources as well as to create a sustainable recycling-oriented society, we had organized research groups that focus on a common theme, organocatalysis. We strived to develop methodologies with a superior total efficiency to synthesize useful substances by sharing and integrating valuable intellectual foundations. We intended to create the future vision of manufacturing based on innovative scientific and technological approaches. To advance the science of sustainable manufacturing and to develop effective and innovative catalytic systems, we promoted the following three research topics. A01 Group: Design of Controlling Systems in Organocatalysis, A02 Group: Development of Molecular Transformations by Organocatalysts, and A03 Group: Practical Synthesis of Useful Substances Using Organocatalysts.

  13. Advanced Molecular Transformations by Organocatalysts

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    2011/04/01 - 2016/03/31

  14. Advanced Molecular Transformation by Concerted Catalysis Based on Organocatalyst/Transition Metal Catalyst Harmonic System

    TERADA Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2011 - 2012

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    The purpose of this research is aimed at establishing the method of supplying the optically active compound in efficient and selective manner. The innovative molecular transformations, which are difficult to realize by the conventional methods, has been achieved by harmonic system composed of the two catalysts, ‘organocatalyst' and ‘transition metal catalyst'. The new catalytic reaction was successfully developed by establishment of the relay catalysis which combined the transition metal catalyst and the organocatalyst.

  15. Advanced Molecular Transformations by Organ catalysts Based on Molecular Recognition

    TERADA Masahiro, NAKAMURA Itaru, MOMIYAMA Norie

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2008 - 2011

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    The activation of a substrate by means of a Bronsted acid and base is the most straightforward and common approach used to promote a reaction and hence Bronsted acids and bases have been widely utilized as efficient catalysts for a number of organic transformations. The development of novel Bronsted acid and base catalysts has been continuously studied due to their broad synthetic applicability. In the past decade, innovative research on Bronsted acid catalysis has enabled great progress. Specifically, research has focused on ' chiral Bronsted acid or base catalysis', in which enantioenriched products are obtained using a catalytic amount of a chiral organic molecule bearing an acidic or basic functionality. In our continuous studies on the cultivation of efficient and selective transformations using chiral Bronsted acids and bases, we successfully developed novel chiral Bronsted acids and several enantioselective transformations.

  16. 水中における酵素模倣型キラルBronsted酸触媒の創製

    寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2007 - 2008

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    環境負荷の軽減を指向した物質変換は、持続可能な社会を実現する上で化学者に課された命題の一つである。生体内における物質変換を担う酵素は、環境に調和した反応系を構築する上でまさに理想的な触媒ということができる。酵素の特徴の一つに水中での物質変換がなされていることが挙げられるが、近年、水中での有機変換反応が盛んに研究されている。その膨大な研究の背景には水の特異な性質、「高い誘電率、水素結合能」とともに、安価で安全であることが、多くの研究者を魅了した最大の理由であろう。しかし、真に効率的な物質変換を目指すのであれば、「環境に優しい」に終始する現状から一歩進んだ革新的なアプローチが不可欠である。本申請研究では水中反応のきっかけとなった生態系での物質変換、すなわち水中で機能する酵素に立ち返ったアプローチ、基質捕捉を鍵とする酵素模倣型触媒の設計開発を目的とする。基質捕捉に基づく酵素模倣型触媒の設計開発を主たる目的とする本申請研究では、触媒の分子設計がその成否を握ることになる。平成20年度はこれまで申請者が設計開発に取り組んできたビナフトール由来のリン酸触媒を継続して検討し、有機溶媒/水との混合溶媒中における触媒機能の探索を検討した。水溶性のアルデヒドであるホルムアルデヒドを用いたアルドール反応の触媒化を検討した結果、有機溶媒/水の混合溶媒系において、リン酸が触媒として機能することを見出した。不斉触媒化については今のところ、充分な結果を得るには至っていない。

  17. 水素結合を戦略的相互作用とする基質認識型キラルBronsted塩基触媒の設計開発

    寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 東北大学

    2007 - 2008

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    グアニジン塩基がプロトン受容した際に形成する水素結合の方向制御に着目し、基質認識部位としての積極的な利用と反応点近傍への効果的な不斉反応場の構築を目指し触媒分子を設計した。要約すると(1)多点水素結合による基質の配向制御によって制御された不斉反応場を構築する。(2)従来の5, 6員環などの普通環ではなく、7員環に加えて9員環などの中員環形成により反応点近傍に不斉環境が構築可能な分子設計を行なう。これらの設計戦略を具現化する軸不斉源として、ビナフチル骨格を選択することにした。光学活性ビナフチル誘導体は入手容易かつ多くの化学修飾例、特に3, 3'一位への置換基導入が報告されていること、また3, 3'一位置換基(G)を適宜選択することで不斉環境を比較的遠くに及ぼすことが可能である。さらに、窒素原子を含む環構造が軸不斉を含んでいるため、中員環構造をとったとしても配座の自由度が比較的小さく複数の反応場の形成が避けられることもビナフチル骨格の利点として挙げられる。本申請研究は触媒反応系の開拓とそれに相応しい高活性と高立体選択的な軸不斉グアニジン触媒の設計開発が鍵となる。そこで、基本となる軸不斉グアニジン触媒のライブラリーを構築するとともに、それを用いて反応系の探索を中心に研究を展開した。触媒ライブラリーは7員環、9員環グアニジンともに、ビナフチル骨格の3, 3'一位に導入する置換基(G)に、立体電子的効果の大きく異なる各種置換ベンゼン環を導入して構築した。このライブラリーをもとに触媒と反応基質間、特に求核剤との間で多重水素結合可能な反応系の探索を行った。その結果、軸不斉グアニジンがα-ケトエステルを求核剤とするアゾジカルボキシラートとのアミノ化反応、ならびにSchiff塩基を1, 3-双極子前躯体とする[3+2]環化付加反応の優れた不斉触媒として機能することを明らかにした。

  18. 軸不斉グアニジン塩基触媒の創製による高効率的かつ高選択的有機変換反応の開発

    寺田 眞浩, PAHADI Nirmal Kumar

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2007 - 2008

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    高い活性と選択性の獲得を目指した新規触媒の設計開発は、真に有用な高度分子変換が切望されるプロセス開拓においてその重要性は高い。受入研究者はこうした要請に応えるべく、基質認識能を備えた有機分子触媒による高度分子変換反応の開発研究を進めている。Bronsted塩基は有機合成化学において官能基炭素分子の最も基本的な活性化剤の一つとして用いられてきたが、触媒としての利用はこれまであまり関心が払われてこなかった。有機強塩基として用いられているグアニジンに着目し、これに軸不斉を導入するという前例の無い分子設計により高い対称性を有するグアニジンの非対称化に成功し、優れた不斉触媒として機能することを明らかにしている。本研究は受入研究者が開発した新規軸不斉グアニジンの特徴を最大限に引き出すべく、本触媒が適用可能な分子変換反応の拡充を目的とし、イミンとニトロアルカンとの反応によるアザHenry反応の開発を検討した。アルデヒド由来のイミンであるアルジミンとニトロメタンとの反応において軸不斉グアニジン塩基を用いた場合は、低いエナンチオ選択性で、中程度の収率でしか生成物を得ることはできなかった。一方、ケトン由来のイミンであるケチミンとのニトロアルカンとの反応では、軸不斉グアニジン触媒による不斉触媒化の前段階の検討として、アキラルなグアニジン塩基であるテトラメチルグアニジンを用いた結果、高収率で4級炭素を有するアザHenry反応生成物を得ることに成功した。この際、ケチミンの保護基の選択が重要で、ボスホリル基が最も優れていることを明らかにした。

  19. 水素結合を戦略的相互作用とする基質認識型キラルBrφnsted塩基触媒の設計開発

    寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 東北大学

    2006 - 2006

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    グアニジン塩基がプロトン受容した際に形成する水素結合の方向制御に着目し、基質認識部位としての積極的な利用と反応点近傍への効果的な不斉反応場の構築を目指し触媒分子を設計した。要約すると(1)多点水素結合による基質の配向制御によって制御された不斉反応場を構築する。(2)従来の5,6員環などの普通環ではなく、7員環に加えて9員環などの中員環形成により反応点近傍に不斉環境が構築可能な分子設計を行なう。これらの設計戦略を具現化する軸不斉源として、ビナフチル骨格を選択することにした。光学活性ビナフチル誘導体は入手容易かつ多くの化学修飾例、特に3,3'-位への置換基導入が報告されていること、また3,3'-位置換基(G)を適宜選択することで不斉環境を比較的遠くに及ぼすことが可能である。さらに、窒素原子を含む環構造が軸不斉を含んでいるため、中員環構造をとったとしても配座の自由度が比較的小さく複数の反応場の形成が避けられることもビナフチル骨格の利点として挙げられる。本申請研究は触媒反応系の開拓とそれに相応しい高活性と高立体選択的な軸不斉グアニジン触媒の設計開発が鍵となる。そこで、基本となる軸不斉グアニジン触媒のライブラリーを構築するとともに、それを用いて反応系の探索を中心に研究を展開した。触媒ライブラリーは7員環、9員環グアニジンともに、ビナフチル骨格の3,3'-位に導入する置換基(G)に、立体電子的効果の大きく異なる各種置換ベンゼン環を導入して構築した。このライブラリーをもとに触媒と反応基質間、特に求核剤との間で多重水素結合可能な反応系の探索を行った。その結果、軸不斉グアニジンが1,3-ジカルボニル化合物を求核剤とするニトロアルカンとの1.4-付加反応ならびにアゾジカルボキシレートとの不斉アミノ化反応の優れた不斉触媒として機能することを明らかにした。

  20. Development of Asymmetric Carbon-Carbon Bond Formation Catalyzed by Chiral Bronsted Acid Based on Molecular Recognition Approach

    TERADA Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2005 - 2006

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    Much effort has been directed towards the development of highly efficient and selective organic transformations. In particular, considerable attention has been devoted to create a novel catalyst with high performance to accelerate organic transformations in highly stereoselective manner. Bronsted acid catalysts have been utilized in valuable organic transformations. If the enantioselective catalysis by chiral Bronsted acid would be accomplished, this provides an advanced approach to the Bronsted acid catalysis. The purpose of this research project is the development of efficient and selective chiral Bronsted acid catalysis for useful organic transformations. We have previously reported the enantioselective direct Mannish reaction catalyzed by chiral phosphoric acids derived form optically pure binahthol derivatives. In our continued studies for the chiral Bronsted acid catalysis, herein we report recent advance in this research project, especially for the development of efficient and enantioselective carbon-carbon bond forming reactions. We developed highly enantioselective Friedel-Crafts reaction of imines with diazoacetates to give a-substituted products of diazoacetates in high enentioselectivity. Second, we have also developed highly enantioselective aza-ene type reaction of imines with enecarbamate as a nucleophile. In the aza-ene type reaction, we successfully demonstrated that the aza-ene type reaction took place efficiently with lowering the load of the chiral catalyst, less than 0.1 mol%. Furthermore, taking advantage of the nature of the present phosphoric acid catalyst as the Bronsted acid, we also successfully developed the first enantioselective Friedel-Crafst reaction of electron rich alkenes with aromatic compounds. The reaction of enecarbametes as electron rich alkenes with indoles gave the corresponding products in high enantioselectivity.

  21. 有機カチオンを活性種とする機能性分子触媒の設計開発

    寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 東北大学

    2004 - 2005

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    環境負荷の軽減は今や重大な社会的要請になっている。機能性を高めた新規触媒の開発による有機合成反応の高効率化はこれに応え得るものとして多くのアプローチがなされている。触媒開発は従来、金属錯体の設計に焦点が絞られ、現在も活発に研究が進められている。本研究はこうした金属触媒ではなく、有機カチオン種を触媒活性種とする分子触媒の開発を行なうことを目的とした。有機カチオン触媒の開発において戦略的な相互作用としてほとんど用いられたことが無い3中心4電子(3c-4e)結合を介した反応基質の活性化に着目した。水素結合は3c-4e結合の代表例であるが、有機カチオン種に付与した機能をこれら3c-4e結合を通じて反応基質に伝え、<有機カチオン種-反応基質>の動的錯体の制御による分子触媒の機能化を目標とした。 アルギニンは天然アミノ酸の一つであるが、その残基としてグアニジンを有している。このグアニジンは生体内ではプロトン化したグアニジウムカチオンとして存在するが、生体内における分子認識部位として極めて重要な役割を果たしている。その鍵となるのが水素結合を介した相互作用であるが、このグアニジニウムカチオンの水素結合能を触媒作用の活性化に活用するべく、グアニジンとアゾール二成分より生成するグアニジニウムカチオンとアゾールアニオンを触媒とする反応系を考案した。具体的にはグアニジンとアゾール二成分触媒系により、アルデヒドとα,β-不飽和カルボニル化合物とのBaylis-Hillman反応の触媒を検討した。2成分触媒系で生じるグアニジニウムカチオンはα,β-不飽和カルボニル化合物の活性化に寄与し、アゾールアニオンの1,4-付加の触媒として作用するとともに、引き続くアルデヒドとのアルドール型反応の活性化にも寄与しBaylis-Hillman反応の効果的な触媒系となることを見出した。

  22. Design of Environmentally Benign Lewis Acid Catalysts Derived from Main Group Elements as an Active Center

    TERADA Masahiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2002 - 2004

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    Lewis acid catalysts are utilized to valuable organic transformations. Although a number of approaches to develop metallic-Lewis acid catalysts were performed, little attention has been paid to explore main group elements as Lewis acidic center. A trityl cation is only the precedent example, in which stabilized carbonium cation function as an active center. The Lewis acids catalyst composed of main group elements can be constructed the catalyst molecule from covalent bonding leading to an advantage in catalyst recycling. Herein we wish to report phosphonium salts as novel Lewis acid catalysts wherein phosphonium salts interact with substrate via hypervalence bonding. Several phosphonium salts with mono or bicyclic ring structure were synthesized. We also introduce oxygen functionality as an electron-withdrawing group to stabilize hypervalence bonding. Phosphonium salts were prepared from the corresponding hydroxy phosphinate and trifluoromethanesulfonic anhydride in the presence of molecular sieves (MS) 4A at room temperature for 1 h. We attempted Lewis acid catalysis by phosphonium salts in Diels-Alder reaction. α,β-unsaturated amide was employed as a dienophile, because NMR experiment strongly suggested that the phosphonium salts function as an activator for amide functionality. In fact, remarkable rate acceleration was observed by using phosphonium salts. Diels-Alder products were obtained quantitatively within 2 h at 0℃. In summary, we performed novel Lewis acid catalysis by phosphonium salts in which dioxaphosphacycle is the key structure to function as Lewis acid catalysts through hypervalence bonding.

  23. 不斉非対称化による不斉金属錯体の触媒的不斉合成法の開発

    寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究

    Institution: 東北大学

    2003 - 2003

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    不斉金属錯体は光学活性化合物の触媒的不斉合成において中心的な役割を果たし、これを如何に開発するかが最大の関心事であったと言える。一方、不斉金属錯体の調製法に焦点をあてると、そのほとんどは光学活性な不斉配位子とアキラルな金属錯体によって構築するという画一的な手法がいまだにとられている。その結果、不斉触媒反応を指向した不斉金属錯体の開発研究は新規な不斉配位子の設計に集中しているのが現状である。その一方で、触媒機能を備えた不斉金属錯体そのものの不斉合成に着目した研究はほとんどなされていない。そこで本申請研究は不斉触媒として機能しうる不斉金属錯体それ自体を触媒量の光学活性分子によって不斉合成することを目的とする。不斉金属錯体それ自体の不斉合成はこれまでに多くの報告がなされている。しかし、その多くは金属錯体を不斉合成することが主たるテーマであり、得られた不斉金属錯体を不斉触媒反応にまで展開した例はまれである。有機化合物の触媒的不斉合成が現実のものとなった今、不斉金属錯体の触媒的不斉合成は決して不可能ではないと考える。本研究の独創性はこうした有機化合物の触媒的不斉合成法、特に不斉非対称化による不斉合成法の成果を踏まえ、これまで全く関心の払われてこなかった不斉金属錯体そのものの触媒的不斉合成法を開発しようとするところにある。平成15年度は不斉金属錯体の触媒的不斉合成に焦点を絞り以下の2項目について並行して検討を進めた。 (1)不斉金属錯体上の中心金属の中心不斉を制御:あらかじめ調製したσ対称性の錯体を光学活性分子によって非対称な錯体と誘導し不斉金属錯体とした。ここでは酸化反応という有機合成的な官能基変換によって配位子を非対称化し、低いながらも不斉誘起に成功した。 (2)金属と錯体形成する際に生じる面不斉の制御:金属錯体とアキラルな配位子を配位させる際、面不斉と中心金属周りの不斉点を光学活性分子を用いて一挙に構築、制御を試みた。現在のところ満足の行く結果は得られていないが今後の検討次第で成果が得られるものと期待している。

  24. 不斉金属錯体の触媒的不斉合成

    寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2002 - 2003

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    光学活性分子を高効率的に不斉合成しようとするキラルテクノロジーはまさに成熟の域に達しようとしている。その中心的な役割を担うのが不斉金属錯体であり、それを如何に開発するかがこれまでの最大の関心事であったと言える。こうした不斉金属錯体の調製法に焦点をあてると、そのほとんどは光学活性な不斉配位子とアキラルな金属錯体によって構築するという画一的な手法がいまだにとられている。その結果、不斉触媒反応を指向した不斉金属錯体の開発研究は新規な不斉配位子の設計が最大の関心事となっている。不斉触媒反応に果たす不斉金属錯体の重要性にもかかわらず、触媒機能を備えた不斉金属錯体そのものの不斉合成に着目した研究はほとんどなされていない。本申請研究はこうした従来法に一石を投ずるべく、不斉触媒として機能しうる不斉金属錯体それ自体を触媒量の光学活性分子によって不斉合成することを目的とした。本年度は不斉金属錯体の触媒的不斉合成に適した系の探索を検討した。本研究では光学活性な配位子を金属錯体に導入するという従来法を適用することはできない。従って、金属とアキラルな配位子が錯体形成する際にchirality(central chiralityやplanar chirality)を生じる場合、あるいは異性化により光学活性な錯体へと変換する場合などが候補として考えられた。本年度はあらかじめ錯形成したσ対称性の錯体を不斉触媒反応によって非対称な錯体へと誘導し不斉金属錯体とする系を探索した。ジチオエーテルを銅錯体とした後に、不斉触媒的な酸化反応を行い、チオエーテル部のスルフィドをスルホキシドへと不斉酸化反応を行なった。その結果、不斉の誘起は不十分であるが、σ対称性の錯体を不斉酸化による非対称化が可能であることを見出し、不斉金属錯体の触媒的不斉合成に成功した。

  25. Design of Synergistic Function and Dynamic Stereocontrol of Hetero multi-metal complexes

    MIKAMI Koichi, OKANO Toshio

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B).

    Institution: Tokyo Institute of Technology

    1998 - 2000

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    While non-racemic catalysts can generate non-racemic products with or without the "non-linear relationship" in enantiomeric excesses between catalysts and products, racemic catalysts inherently give only a racemic mixture of chiral products. Asymmetric catalysts can be further evolved into highly activated catalysts by association with chiral activators. This asymmetric activation process is particularly useful in racemic catalysis through selective activation of the one enantiomer of the racemic catalysts. Recently, a strategy whereby a racemic catalyst is selectively deactivated by a chiral additive has been reported as "chiral poisoning" to yield non-racemic products. 'Asymmetric activation' is an alternative but conceptually opposite strategy to asymmetric catalysts in which a chiral activator selectively activates rather than deactivates one enantiomer of a racemic chiral catalyst. The advantage of this activation strategy over the deactivation counterpart is that the activated catalyst can produce a greater enantiomeric excess (x_<act>% ee) in the products, even when using a catalytic amount of activator per chiral catalyst, than the ee attained by the enantiomerically pure catalyst on its own. Therefore, 'asymmetric activation' could provide a general and powerful strategy for the use of not only chirally rigid, racemic ligands but also chirally flexible ligands without enantiomeric resolution!

  26. 異種金属錯体触媒間の相乗作用の設計と動的立体化学制御

    三上 幸一, 寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特定領域研究(B)

    Institution: 東京工業大学

    1998 - 2000

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    現代の有機合成化学の最重要課題は立体化学の制御を含めた反応の選択性の追及にある。高選択的な立体化学制御のためには、触媒反応の設計とその動的な制御が不可欠である。本研究では、(1)新しいコンセプトに基づく触媒系の創製、(2)触媒と基質との相互作用の動的挙動の解明、および(3)外部分子による制御を研究テーマとして新しい動的立体化学制御法の確立を目的とする。この際、反応の動力学や立体化学などの実験に基づいて動的立体化学の考察を行うとともに、計算化学による遷移状態の解析も検討した。 金属錯体触媒がホモメタリックなコンプレックスを優先的に形成するのか、ヘテロメタリックなコンプレックスを形成するのか、さらには可逆的な錯体形成するのか非可逆的な錯体形成をするのか。最後に基質が反応する際に、ホモ対ヘテロメタリックな2種の金属錯体触媒の示す相対速度も問題となる。従って、コンプレックス形成の平衡定数(K)、基質との相互作用の速度k_R,k_Sと逆反応速度k_R,k_S、さらにはそれぞれの基質/錯体触媒による基質の反応速度k_<R,R>,k_<S,R>(異種錯体触媒間のキラリティーの組み合わせを示す)によって選択性が決定される。本年度は、こうした動的立体化学制御の連続的変化を数値解析した。

  27. 触媒的立体化学制御法に基づく生理活性化合物の不斉合成

    寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東京工業大学

    1995 - 1995

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    近年、生理活性の発現メカニズムの解明と、それに基づく新規医薬品の開発研究に伴い、光学活性な生理活性化合物の効率的な不斉合成法の開発は、今日の有機工業化学における最重要課題の一つとなっている。こうした背景のもと、申請者らはここ数年、効率化と実用化に根ざした不斉合成反応の開発を目指し、触媒による立体化学制御法の開発に取り組んできた。特に、不斉触媒による不斉炭素-炭素結合生成(CCF)反応の開発に焦点を絞ったこれまでの研究では、光学活性ビナフトールを不斉配位子とするキラルチタン錯体が代表的なCCF反応であるエン反応、アルドール反応、Diels-Alder反応などの優れた不斉触媒となることを明らかにしている。そこで本研究は、これまで申請者が検討を重ねてきた不斉触媒的CCF反応における経験と実績を生かし、生理活性化合物の効率的かつ実用的な不斉合成法の開発を目的とする。 生理活性化合物の合成には高いレベルでの不斉炭素の立体化学制御と同時に、適切な位置への官能基の導入が必須である。この際、新規不斉触媒の開発も高度な立体化学制御を達成する上で重要となってくる。本研究はこうした問題点に答えるべく、申請者が独自に開発した不斉触媒的CCF反応を生理活性化合物の合成に応用したものである。申請者の開発した不斉触媒的CCF反応はいずれも汎用性の高い代表的な炭素骨格構築法である。従ってかなり広い範囲への適応が考えられるが、本研究では特に以下の2つの生理活性化合物に絞り、その触媒的不斉合成法の開発を検討した。 1)ダイエット甘味料として注目されているジペプチドは不斉触媒的エン反応を鍵反応として93%以上の立体化学純度で不斉合成することに成功した。 2)HMG-CoAの生合成阻害剤であり、血圧降下剤であるメビノリン類の鍵中間体として注目されているδ-ラクトンは不斉触媒的Diels-Alder反応を鍵反応として96%eeと極めて高い光学純度で不斉合成することに成功した

  28. 不斉ルイス酸触媒を用いる不斉炭素-炭素結合生成反応の開発

    寺田 眞浩

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東京工業大学

    1993 - 1993

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    本研究は、不斉ルイス酸触媒の設計開発を中心に、代表的な炭素-炭素結合生成(CCF)反応の不斉触媒化を検討し、生理活性化合物合成に即した不斉触媒的CCF反応の開発を目的とする。従って、本研究の成否は主にこれら代表的なCCF反応に対する有効な不斉ルイス酸触媒の設計開発にかかっているといえる。ここ数年申請者は、代表的なCCF反応の一つであるエン反応の不斉触媒化に取り組みビナフトールを不斉配位子とするキラルチタン錯体が極めて有効な不斉触媒となることを見いだしている。そこでこのキラルチタン錯体を用いてCCF反応の不斉触媒化を検討することにした。一方、対象とするCCF反応には、その合成的な有用性が広く認められている(へテロ)Diels-Alder反応を特にとりあげ、これらの不斉触媒化を検討した。 まず、グリオキシラートを親ジエン体とするアルコキシジエンとのへテロ-Diels-Alder反応では、極めて高い光学純度でジヒドロピラン誘導体が得られることを見いだし、このキラルチタン錯体が本反応の極めて有効な不斉触媒となることを明らかにした。さらに、この不斉触媒的へテロ-Diels-Alder反応を鍵反応として、グリオキシラートと1-メトキシブタジエンとの触媒反応によって得られた生成物を、血圧降下剤として注目されているコンパクチンのラクトン部へと導いた。つまり、本手法が、生理活性発現の鍵構造であるラクトン部の極めて効率的な不斉合成法となることを明らかにした。さらに、alpha,beta-不飽和ケトンおよびアルデヒドを親ジエン体とするアルコキシジエンとの不斉触媒的Diels-Alder反応においても、シクロヘキセン誘導体が光学純度良く得られ、このキラルチタン錯体がDiels-Alder反応においても極めて有効であることを明らかにした。さらに、本不斉触媒反応を利用して抗ガン剤として注目されているアントラサイクリン系抗生物質の鍵中間体の触媒的不斉合成も行った。

  29. Development of Asymmetric Catalysis of Synthetic Reactions

    NAKAI Takeshi, TERADA Masahiro, TOMOOKA Katsuhiko, MIKAMI Koichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for General Scientific Research (A)

    Institution: Tokyo Institute of Technology

    1990 - 1992

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    The purpose of this work is to develop efficient asymmetric catalysis of some C-C bond forming reactions. A summary of the research results is as follow: (1) Catalytic Stereocontrol in Asymmetric Aldol reactions : Using Eu(III)-complexes as a catalyst, high levels of distereocontrol have been achieved in the aldol reactions of chiral alpha-amino aldehydes with ketene silyl acetals Furthermore, the catalytic aldol technology has successfully been applied to asymmetric synthesis of the key intermiediates of carbapenem antibiotics and renin inhibitors. (2) Asymmetric catalysis of Carbonyl-Ene Reactions : The chiral titanium complex derived from optically active binaphthol was found to serve as an efficient asymmetric catalyst for glyoxylate-ene reaction to provide a practical access to alpha-hydroxy esters in high enantiomeric excess. Interestingly, the phenomenon of "asymmetric amplification" was observed and its mechanistic origin was elucidated. (3) Asymmetric Catalysis of Diels-Alder Type Reactions : The above-mentioned chiral titanium comples was found to serve as an asymmetric catalyst for hetero D.-A. reaction with the glyoxylate and D.-A.reactions with methacrolein and quinones. (4) Asymmetric Catalysis of Allylmetal/Aldehyde Addition Reactions : The abovementioned chiral Ti-complex was also found to be an efficient asymmetric catalyst for the addition reactions of allylic silanes and stannanes to the glyoxylate. (5) Asymmetric Catalysis of Claisen Rearrangement : A palladium (II) complex was found to show an efficient and diastereoselective catalysis of the Claisen rearrangement via an ether exchange process. However, the development of an asymmetric catalyst has been still unsuccessful. Further work is in progress.

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