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Masahiko Tohma

Hokkaido University

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Publication

Featured researches published by Masahiko Tohma.

Journal of Chromatography A | 1969

Quantitative determination of mono- and oligosaccharides in potato tubers by gas-liquid chromatography

Michiya Kimura; Masahiko Tohma; Yozo Okazawa; Norimoto Murai

Tetrahedron Letters | 1973

Novel β-epoxidation of cholesterol and its analogs with ferric acetylacetonate and hydrogen peroxide

Masahiko Tohma; Tsutomu Tomita; Michiya Kimura

Chemical & Pharmaceutical Bulletin | 1972

Metal Ion Catalized Oxidation of Steroids. I. 15α-Hydroxylation of Deoxycholic Acid in Aqueous Solution by Ferrous Ion-Molecular Oxygen System

Michiya Kimura; Meiji Kawata; Masahiko Tohma; Akiharu Fujino; Katsuhiko Yamazaki; Takuji Sawaya

Chemical & Pharmaceutical Bulletin | 1968

Constituents of Convallaria. X. Structures of Convallasaponin-A, -B, and Their Glucosides

Michiya Kimura; Masahiko Tohma; Itsuo Yoshizawa; Hirotoshi Akiyama

Chemical & Pharmaceutical Bulletin | 1978

A Convenient Synthesis of Estrone and 11-Methylequilenines based on the Thermal Elimination of β-Ketosulfoxides

Takao Kurosawa; Masahiko Tohma; Yuji Oikawa; Osamu Yonemitsu

Chemical & Pharmaceutical Bulletin | 1972

Metal Ion Catalyzed Oxidation of Steroids. II. Oxidation of Cholesterol by Fenton's Reagent in Acetic Acid Solution

Michiya Kimura; Masahiko Tohma; Tsutomu Tomita

Chemical & Pharmaceutical Bulletin | 1981

Synthesis of 12α and 12β-Carboxyestradiol Derivatives via the Thermal Elimination of β-Ketosulfoxide

Takao Kurosawa; Masahiko Tohma; Yuji Oikawa; Osamu Yonemitsu

Chemical & Pharmaceutical Bulletin | 1973

Metal Ion Catalyzed Oxidation of Steroids. III. Reactions of Cholesterol with Ferrous Ions- and Titanous Ions-Hydrogen Peroxide Systems in Acetonitrile

Michiya Kimura; Masahiko Tohma; Tsutomu Tomita

Chemical & Pharmaceutical Bulletin | 1968

Quantitative Analysis of Sugar Components in Steroidal Saponins by Gas Liquid Chromatography

Michiya Kimura; Yasutsugu Hattori; Itsuo Yoshizawa; Masahiko Tohma

Tetrahedron Letters | 1970

Formation of 3α,12α,15α-trihydroxycholanic acid from deoxycholic acid by ferro-ascorbate system

Michiya Kimura; Meiji Kawata; Masahiko Tohma; Akiharu Fujino; K. Yamasaki

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Michiya Kimura

Hokkaido University

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Itsuo Yoshizawa

Hokkaido University

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Akiharu Fujino

Hokkaido University

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Takao Kurosawa

Hokkaido University

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Tsutomu Tomita

Hokkaido University

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Katsuhiko Yamazaki

Hokkaido University

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Meiji Kawata

Hokkaido University

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Osamu Yonemitsu

Hokkaido University

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Yuji Oikawa

Hokkaido University

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Akihumi Inoue

Hiroshima University

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