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Takuya Washio

Hokkaido University

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Publication

Featured researches published by Takuya Washio.

Heterocycles | 2010

The Mukaiyama aldol and Mukaiyama-Michael reactions promoted by commercially available molecular sieves

Masahiro Anada; Takuya Washio; Yudai Watanabe; Shunichi Hashimoto

The Mukaiyama aldol reaction of silyl ketene acetals with aldehydes has been effected by using commercially available 4A molecular sieves (4A MS) as a promoter. Various silyl ketene acetals and silyl enol ethers have been shown to be effective nucleophiles for this reaction. For the first time, it has been found that 4A MS can promote the Mukaiyama―Michael addition reactions of silyl ketene acetals to α,β-enones.

Organic Letters | 2007

Catalytic enantioselective amination of silyl enol ethers using chiral dirhodium(II) carboxylates: asymmetric formal synthesis of (-)-metazocine.

Masahiro Anada; Masahiko Tanaka; Takuya Washio; Minoru Yamawaki; Takumi Abe; Shunichi Hashimoto

Angewandte Chemie | 2004

A New Dirhodium(II) Carboxamidate Complex as a Chiral Lewis Acid Catalyst for Enantioselective Hetero‐Diels–Alder Reactions

Masahiro Anada; Takuya Washio; Naoyuki Shimada; Shinji Kitagaki; Makoto Nakajima; Motoo Shiro; Shunichi Hashimoto

Tetrahedron | 2007

Asymmetric syntheses of diarylheptanoid natural products (−)-centrolobine and (−)-de-O-methylcentrolobine via hetero-Diels–Alder reaction catalyzed by dirhodium(II) tetrakis[(R)-3-(benzene-fused-phthalimido)-2-piperidinonate]

Takuya Washio; Reika Yamaguchi; Takumi Abe; Hisanori Nambu; Masahiro Anada; Shunichi Hashimoto

Tetrahedron Letters | 2007

Enantioselective amination of silylketene acetals with (N-arylsulfonylimino)phenyliodinanes catalyzed by chiral dirhodium(II) carboxylates: asymmetric synthesis of phenylglycine derivatives

Masahiko Tanaka; Yasunobu Kurosaki; Takuya Washio; Masahiro Anada; Shunichi Hashimoto

Tetrahedron-asymmetry | 2007

Catalytic asymmetric hetero-Diels–Alder route to a key intermediate for the synthesis of calyxin L

Takuya Washio; Hisanori Nambu; Masahiro Anada; Shunichi Hashimoto

European Journal of Organic Chemistry | 2010

A Short, Catalytic, Asymmetric Synthesis of Diospongins A and B by a One-Pot, Sequential Hetero-Diels–Alder/Mukaiyama–Michael Reaction Process

Masahiro Anada; Takuya Washio; Yudai Watanabe; Koji Takeda; Shunichi Hashimoto

Chemical Communications | 2012

Enantio- and diastereoselective hetero-Diels–Alder reactions between 2-aza-3-silyloxy-1,3-butadienes and aldehydes catalyzed by chiral dirhodium(II) carboxamidates

Yudai Watanabe; Takuya Washio; Janagiraman Krishnamurthi; Masahiro Anada; Shunichi Hashimoto

Heterocycles | 2005

Dirhodium(II) Tetrakis[N-benzene-fused Phthaloyl-(S)-piperidinonate] as a Chiral Lewis Acid: Catalytic Enantioselective Aldol Reactions of Acetate-derived Silylketene Acetals and Aldehydes

Takuya Washio; Seiichi Nakamura; Masahiro Anada; Shunichi Hashimoto

Synfacts | 2010

Rhodium(II) Carboxamidate Catalyzed Hetero-Diels-AlderReaction of Rawal’s Diene

Y. Watanabe; Takuya Washio; Naoyuki Shimada; Masahiro Anada; Shunichi Hashimoto

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Collaboration

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Masahiro Anada

Nihon University

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Shunichi Hashimoto

Hokkaido University

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Yudai Watanabe

Hokkaido University

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Masahiko Tanaka

Hokkaido University

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Naoyuki Shimada

Hokkaido University

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Takumi Abe

Hokkaido University

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Hisanori Nambu

Hokkaido University

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Minoru Yamawaki

Hokkaido University

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Reika Yamaguchi

Hokkaido University

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Janagiraman Krishnamurthi

Hokkaido University

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