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Hiroshi Sai

Tokyo Institute of Technology

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Publication

Featured researches published by Hiroshi Sai.

Tetrahedron Letters | 1999

Facile stereoselective syntheses of (E)- and (Z) -α-substituted cinnamates by stereoselective dehydration reaction with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC)

Hiroshi Sai; Hiroshi Ohmizu

Abstract Highly stereoselective syntheses of ( E )- and ( Z )-α-substituted c innamates have been achieved by dehydration reaction of anti - and syn -α-substituted-β-hydroxyphenylpropionates with EDC in good yields. This facile method has been applied to the stereoselective syntheses of ( E )- and ( Z )-α-alkylidene-γ-butyrolactones.

Chemical & Pharmaceutical Bulletin | 1984

Synthesis and Biological Activity of 1α-Fluoro-25-hydroxyvitamin D3

Etsuo Ohshima; Hiroshi Sai; Suguru Takatsuto; Nobuo Ikekawa; Yoshiro Kobayashi; Yoko Tanaka; Hector F. Deluca

Synthesis | 2003

Stereoselective Syntheses of (E)-α,β-Dehydroamino Acids and (E)-α,β-De­hydropeptides by Stereospecific Dehydration with 1-Ethyl-3-(3-dimethyl­aminopropyl)carbodiimide (EDC)

Hiroshi Sai; Tsuyoshi Ogiku; Hiroshi Ohmizu

Tetrahedron Letters | 1984

Synthesis of 23,23-difluoro-25-hydroxyvitamin D3

Takeo Taguchi; Satoshi Mitsuhashi; Akiko Yamanouchi; Yoshiro Kobayashi; Hiroshi Sai; Nobuo Ikekawa

Chemical & Pharmaceutical Bulletin | 1985

Synthesis of 1.ALPHA.,25-dihydroxy-26,27-dimethylvitamin D3, a highly active analogue of 1.ALPHA.,25-dihydroxyvitamin D3.

Hiroshi Sai; Suguru Takatsuto; Noriyuki Hara; Nobuo Ikekawa

Biochemistry | 1986

Unique rearrangement of ergocalciferol side chain in vitro: production of a biologically highly active homologue of 1,25-dihydroxyvitamin D3

Yoko Tanaka; Rafal R. Sicinski; Hector F. DeLuca; Hiroshi Sai; Nobuo Ikekawa

Chemical & Pharmaceutical Bulletin | 1988

Synthesis of 26,27-dialkyl analogues of 1.ALPHA.,25-dihydroxyvitamin D3.

Tadashi Eguchi; Hiroshi Sai; Suguru Takatsuto; Noriyuki Hara; Nobuo Ikekawa

Tetrahedron | 2007

Facile stereoselective synthesis of (E)-and (Z)-α-substituted cinnamates : Stereospecific dehydration reaction with 1 -ethyl -3 -(3 -dimethylaminopropyl )carbodiimide (EDC) and copper(II) chloride

Hiroshi Sai; Tsuyoshi Ogiku; Hiroshi Ohmizu

Chemical & Pharmaceutical Bulletin | 1986

Synthesis of some side-chain homologues of 1 alpha,25-dihydroxyvitamin D3 and investigation of their biological activities.

Hiroshi Sai; Suguru Takatsuto; Nobuo Ikekawa; Yoko Tanaka; Hector F. DeLuca

Chemical & Pharmaceutical Bulletin | 2006

Synthesis of 1,4-Diphenylbutadiene Derivatives: Novel Inducer of Tissue-Type Plasminogen Activator (t-PA) in Cultured Bovine Endothelial Cells

Hiroshi Sai; Tsuyoshi Ogiku; Hiroshi Ohmizu; Akio Ohtani

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Nobuo Ikekawa

Tokyo Institute of Technology

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Hiroshi Ohmizu

Kyoto University

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Suguru Takatsuto

Tokyo Institute of Technology

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Akio Ohtani

Mitsubishi

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Jun Murakami

Mitsubishi

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Yoko Tanaka

Fukuoka University

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Hector F. DeLuca

University of Wisconsin-Madison

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Tsuyoshi Ogiku

Mitsubishi Tanabe Pharma

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Yoshiro Kobayashi

Toho University

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Hector F. Deluca

Tokyo Institute of Technology

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