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Norihito Tokunaga

Kyoto University

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Organic Letters | 2008

Rhodium/Chiral Diene-Catalyzed Asymmetric 1,4-Addition of Arylboronic Acids to Arylmethylene Cyanoacetates

Sebastian Sörgel; Norihito Tokunaga; Keigo Sasaki; and Kazuhiro Okamoto; Tamio Hayashi

Asymmetric 1,4-addition of arylboronic acids to (E)-methyl 2-cyano-3-arylpropenoates proceeded in the presence of a rhodium catalyst (3 mol %) coordinated with a chiral diene ligand, (R,R)-Ph-bod*, to give high yields of the corresponding methyl 3,3-diaryl-2-cyanopropanoates with high enantioselectivity (up to 99% ee). This catalytic asymmetric transformation was applied to the asymmetric synthesis of (R)-tolterodine.

Journal of the American Chemical Society | 2003

A chiral chelating diene as a new type of chiral ligand for transition metal catalysts: its preparation and use for the rhodium-catalyzed asymmetric 1,4-addition.

Tamio Hayashi; Kazuhito Ueyama; Norihito Tokunaga; Kazuhiro Yoshida

Journal of the American Chemical Society | 2004

C2-Symmetric Bicyclo[2.2.2]octadienes as Chiral Ligands: Their High Performance in Rhodium-Catalyzed Asymmetric Arylation of N-Tosylarylimines

Norihito Tokunaga; Yusuke Otomaru; Kazuhiro Okamoto; Kazuhito Ueyama; Ryo Shintani; Tamio Hayashi

Organic Letters | 2005

C2-Symmetric Bicyclo[3.3.1]nonadiene as a Chiral Ligand for Rhodium-Catalyzed Asymmetric Arylation of N-(4-Nitrobenzenesulfonyl)arylimines

Yusuke Otomaru; Norihito Tokunaga; and Ryo Shintani; Tamio Hayashi

Organic Letters | 2005

Rhodium-catalyzed asymmetric 1,4-addition of arylboronic acids to coumarins: asymmetric synthesis of (R)-tolterodine.

Gang Chen; Norihito Tokunaga; Tamio Hayashi

Journal of the American Chemical Society | 2003

Functionalization on Silica Gel with Allylsilanes. A New Method of Covalent Attachment of Organic Functional Groups on Silica Gel

Toyoshi Shimada; Kazuko Aoki; Yo Shinoda; Tomoaki Nakamura; Norihito Tokunaga; Shinji Inagaki; Tamio Hayashi

Journal of the American Chemical Society | 2004

A New Entry of Nucleophiles in Rhodium-Catalyzed Asymmetric 1,4-Addition Reactions: Addition of Organozinc Reagents for the Synthesis of 2-Aryl-4-piperidones

Ryo Shintani; Norihito Tokunaga; Hidenori Doi; Tamio Hayashi

Angewandte Chemie | 2004

Asymmetric Synthesis of Diarylmethyl Amines by Rhodium‐Catalyzed Asymmetric Addition of Aryl Titanium Reagents to Imines

Tamio Hayashi; Masahiro Kawai; Norihito Tokunaga

Journal of the American Chemical Society | 2001

Palladium-catalyzed asymmetric hydrosilylation of 4-substituted 1-buten-3-ynes. Catalytic asymmetric synthesis of axially chiral allenylsilanes.

Jin Wook Han; Norihito Tokunaga; Tamio Hayashi

Angewandte Chemie | 2005

Rhodium‐Catalyzed Asymmetric 1,6‐Addition of Aryl Zinc Reagents to Dienones

Tamio Hayashi; Shohei Yamamoto; Norihito Tokunaga

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Tamio Hayashi

Agency for Science

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Kazuhiro Okamoto

Kyoto University

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Ryo Shintani

University of Tokyo

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Kazuhiro Yoshida

Kyoto University

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Kazuhito Ueyama

Kyoto University

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Shohei Yamamoto

Kyoto University

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Yusuke Otomaru

Kyoto University

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Gang Chen

Kyoto University

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Hidenori Doi

Kyoto University

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Kazuko Aoki

Kyoto University

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