Taketo Ikeno
Keio University
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Publication
Featured researches published by Taketo Ikeno.
Science and Technology of Advanced Materials | 2006
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.
Heterocycles | 2006
Tomoko Ashizawa; Natsuki Ohtsuki; Tomoyuki Miura; Makoto Ohya; Takaomi Shinozaki; Taketo Ikeno; Tohru Yamada
In the presence of a catalytic amount of the optically active cobalt(III) hexafluoroantimonate, the inverse electron-demand 1,3-dipolar cycloaddition reaction of dihydrofuran with nitrones bearing an electron-withdrawing group effectively proceeded to afford the corresponding adducts with excellent endo-selectivity.
Chemistry Letters | 2004
Youichi Kogami; Takahiro Nakajima; Tomoko Ashizawa; Satoko Kezuka; Taketo Ikeno; Tohru Yamada
Angewandte Chemie | 2005
Izumi Iwakura; Taketo Ikeno; Tohru Yamada
Organic Letters | 2006
Ai Kokura; Saiko Tanaka; Taketo Ikeno; Tohru Yamada
Journal of Organic Chemistry | 2006
Tony K. M. Shing; Annie W. F. Wong; Taketo Ikeno; Tohru Yamada
Synthesis | 2004
Youichi Kogami; Takahiro Nakajima; Taketo Ikeno; Tohru Yamada
Chemistry-an Asian Journal | 2006
Izumi Iwakura; Miho Hatanaka; Ai Kokura; Haruna Teraoka; Taketo Ikeno; Takushi Nagata; Tohru Yamada
Chemistry Letters | 2006
Yasuhiko Gunji; Yoshihiro Yamashita; Taketo Ikeno; Tohru Yamada
Chemistry Letters | 2007
Ai Kokura; Saiko Tanaka; Haruna Teraoka; Atsushi Shibahara; Taketo Ikeno; Takushi Nagata; Tohru Yamada