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Dive into the research topics where Satoko Kezuka is active.

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Featured researches published by Satoko Kezuka.


Science and Technology of Advanced Materials | 2006

Manganese and cobalt 3-oxobutylideneaminato complexes: Design and application for enantioselective reactions

Tohru Yamada; Taketo Ikeno; Yuhki Ohtsuka; Satoko Kezuka; Mitsuo Sato; Izumi Iwakura

Abstract The optically active 3-oxobutylideneaminato transition-metal complexes have been developed as efficient catalysts for a variety of enantioselective reactions; e.g. the corresponding manganese(III) complexes catalyzed the enantioselective aerobic epoxidation of unfunctionalized olefins, and the corresponding cobalt complexes have been developed for the enantioselective borohydride reduction of various carbonyl compounds. The cobalt complexes could also be employed for the catalytic enantioselective cyclopropanation with diazoacetates and the Lewis acid catalyses such as the hetero Diels–Alder reaction, carbonyl–ene reaction, and 1,3-dipolar cycloaddition of nitrones. In the presence of the cobalt complex, the Henry reaction proceeded with a high enantioselectivity, and the enantioselective chemical fixation of carbon dioxide to obtain the optically active cyclic carbonate. In these Lewis acid catalyses, the valence of cobalt and the counter anion have significant effects on the reaction rate and stereoselectivity.


Synthesis | 2006

Iridium-Catalyzed Formation of Carbon-Carbon and Carbon-Heteroatom Bonds

Ryo Takeuchi; Satoko Kezuka


Chemistry Letters | 2004

Enantioselective Henry Reaction Catalyzed by Optically Active Ketoiminatocobalt Complexes

Youichi Kogami; Takahiro Nakajima; Tomoko Ashizawa; Satoko Kezuka; Taketo Ikeno; Tohru Yamada


Journal of Organic Chemistry | 2006

Iridium Complex-Catalyzed [2+2+2] Cycloaddition of α,ω-Diynes with Monoynes and Monoenes

Satoko Kezuka; Shigeru Tanaka; Toshihito Ohe; Yoshihiko Nakaya; Ryo Takeuchi


Organic Letters | 2005

Iridium Complex-Catalyzed Reaction of 1,6-Enynes: Cycloaddition and Cycloisomerization

Satoko Kezuka; Toshiaki Okado; Eri Niou; Ryo Takeuchi


Organic Letters | 2001

Optically Active β-Ketoiminato Cationic Cobalt(III) Complexes: Efficient Catalysts for Enantioselective Carbonyl-Ene Reaction of Glyoxal Derivatives

Satoko Kezuka; Taketo Ikeno; Tohru Yamada


Bulletin of the Chemical Society of Japan | 2003

Enantioselective 1, 3-Dipolar Cycloaddition Reaction of Nitrones with α, β-Unsaturated Aldehydes Catalyzed by Cationic 3-Oxobutylideneaminatocobalt(III) Complexes

Satoko Kezuka; Natsuki Ohtsuki; Tsuyoshi Mita; Youichi Kogami; Tomoko Ashizawa; Taketo Ikeno; Tohru Yamada


Bulletin of the Chemical Society of Japan | 2001

Highly Active 3-Oxobutylideneaminatocobalt Complex Catalysts for an Enantioselective Hetero Diels-Alder Reaction.

Satoko Kezuka; Tsuyoshi Mita; Natsuki Ohtsuki; Taketo Ikeno; Tohru Yamada


Chemistry Letters | 2000

Optically Active Cationic Cobalt(III) Complexes: Highly Efficient Catalysts for Enantioselective Hetero Diels–Alder Reaction

Satoko Kezuka; Tsuyoshi Mita; Natsuki Ohtsuki; Taketo Ikeno; Tohru Yamada


Bulletin of the Chemical Society of Japan | 2003

Enantioselective Carbonyl-Ene Reaction of Glyoxal Derivatives Catalyzed by Cationic 3-Oxobutylideneaminatocobalt(III) Complexes

Satoko Kezuka; Youichi Kogami; Taketo Ikeno; Tohru Yamada

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Ryo Takeuchi

Aoyama Gakuin University

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Eri Niou

Aoyama Gakuin University

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Gen Onodera

Aoyama Gakuin University

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