Stereochemistry of the palladium-catalyzed hydrogenation of 3-oxo-4-ene steroids. V. A kinetic study in basic and acidic media.
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概要
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Effects of the β-methyl group at C-10 and some oxygen functions (=O, OH, OAc) at C-11, C-17, and C-20 on the rates of hydrogenation of 3-oxo-4-ene steroids have been studied with palladium catalyst in pyridine or THF/HBr as solvent. In contrast to the hydrogenation in pyridine, the rate in THF/HBr was greatly depressed by the presence of 10β-methyl group. The reactivity of the steroids was enhanced by the oxygen functions, in particular, by 11, 17-dioxo group. The effects of the substituents are discussed from a mechanistic consideration based on the obtained results.
- 公益社団法人 日本化学会の論文
著者
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KAWAMURA Hideo
Department of Applied Chemistry and Biotechnology, Niihama National College of Technology
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Nishimura Shigeo
Department Of Applid Chemistry For Resources Tokyo University Of Agriculture And Technology
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Shiota Michio
Department of Chemistry, Faculty of Science, Ochanomizu University
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Momma Yasuhiro
Department of Industrial Chemistry, Tokyo University of Agriculture and Technology
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Kawamura Hideo
Department of Industrial Chemistry, Tokyo University of Agriculture and Technology
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