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Tatsunobu Sumiya

Tokyo University of Science

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Publication

Featured researches published by Tatsunobu Sumiya.

Chemical Communications | 2007

Dry and wet prolines for asymmetric organic solvent-free aldehyde–aldehyde and aldehyde–ketone aldol reactions

Yujiro Hayashi; Seiji Aratake; Takahiko Itoh; Tsubasa Okano; Tatsunobu Sumiya; Mitsuru Shoji

Dry and wet prolines were found to catalyze the direct aldol reactions of aldehyde-aldehyde and aldehyde-ketone, respectively, to afford aldols with excellent diastereo- and enantioselectivities, and an organic solvent-free reaction was realized in some cases.

Angewandte Chemie | 2006

Highly diastereo- and enantioselective direct aldol reactions in water.

Yujiro Hayashi; Tatsunobu Sumiya; Junichi Takahashi; Hiroaki Gotoh; Tatsuya Urushima; Mitsuru Shoji

Angewandte Chemie | 2006

Combined Proline–Surfactant Organocatalyst for the Highly Diastereo‐ and Enantioselective Aqueous Direct Cross‐Aldol Reaction of Aldehydes

Yujiro Hayashi; Seiji Aratake; Tsubasa Okano; Junichi Takahashi; Tatsunobu Sumiya; Mitsuru Shoji

Angewandte Chemie | 2004

Direct proline-catalyzed asymmetric α-aminoxylation of ketones

Yujiro Hayashi; Junichiro Yamaguchi; Tatsunobu Sumiya; Mitsuru Shoji

Chemistry: A European Journal | 2007

Highly diastereo- and enantioselective direct aldol reactions of aldehydes and ketones catalyzed by siloxyproline in the presence of water

Seiji Aratake; Takahiko Itoh; Tsubasa Okano; Norio Nagae; Tatsunobu Sumiya; Mitsuru Shoji; Yujiro Hayashi

Journal of Organic Chemistry | 2004

Direct Proline-Catalyzed Asymmetric α-Aminoxylation of Aldehydes and Ketones

Yujiro Hayashi; Junichiro Yamaguchi; Tatsunobu Sumiya; Kazuhiro Hibino; Mitsuru Shoji

Advanced Synthesis & Catalysis | 2004

A highly active 4-siloxyproline catalyst for asymmetric synthesis

Yujiro Hayashi; Junichiro Yamaguchi; Kazuhiko Hibino; Tatsunobu Sumiya; Tatsuya Urushima; Mitsuru Shoji; Daisuke Hashizume; Hiroyuki Koshino

Angewandte Chemie | 2004

Direct Proline-Catalyzed Asymmetricα-Aminoxylation of Ketones

Yujiro Hayashi; Junichiro Yamaguchi; Tatsunobu Sumiya; Mitsuru Shoji

Angewandte Chemie | 2010

Stereoselective Total Synthsis of (±)‐Urechitol A

Tatsunobu Sumiya; Ken Ishigami; Hidenori Watanabe

Tetrahedron Letters | 2010

Determination of the absolute configuration of nodulisporacid A by the concise synthesis of four stereoisomers via three-component reaction and one-pot construction of the framework

Tatsunobu Sumiya; Ken Ishigami; Hidenori Watanabe

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Mitsuru Shoji

Tohoku University

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Yujiro Hayashi

University of Tokyo

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Junichi Takahashi

Tokyo University of Science

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Junichiro Yamaguchi

Waseda University

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Seiji Aratake

Tokyo University of Science

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Tatsuya Urushima

Tokyo University of Science

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Tsubasa Okano

Tokyo University of Science

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Hidenori Watanabe

University of Tokyo

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Hiroaki Gotoh

Tokyo University of Science

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Ken Ishigami

University of Tokyo

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