Autooxidation of Δ17(20)-20-hydroxy derivatives of steroids. Synthesis of 3β-acetoxy-17α-hydroperoxy-16α-methylpregn-5-en-20-one and its reduction to 17α-hydroxy derivative
摘要:
An efficient procedure was proposed for the synthesis of 3 beta-acetoxy-17 alpha-hydroperoxy-16 alpha-methyl-pregn-5-en-20-one. Optimal conditions were found for the combined process including 1,4-addition of methyl-magnesium bromide at the Delta(16)-20-oxo fragment of dehydropregnenolone acetate and autooxidation of resulting bromomagnesium 3 beta-acetoxy-16 alpha-methylpregna-5,17(20)-dien-20-olate. The subsequent reduction of the 17 alpha-hydroperoxy group and hydrolysis of the 3 beta-acetoxy group afforded 17 alpha-hydroxy-16 alpha-methyl-substituted dehydropregnenolone acetate and its 3-hydroxy analog in high yield.
Autooxidation of Δ17(20)-20-hydroxy derivatives of steroids. Synthesis of 3β-acetoxy-17α-hydroperoxy-16α-methylpregn-5-en-20-one and its reduction to 17α-hydroxy derivative
摘要:
An efficient procedure was proposed for the synthesis of 3 beta-acetoxy-17 alpha-hydroperoxy-16 alpha-methyl-pregn-5-en-20-one. Optimal conditions were found for the combined process including 1,4-addition of methyl-magnesium bromide at the Delta(16)-20-oxo fragment of dehydropregnenolone acetate and autooxidation of resulting bromomagnesium 3 beta-acetoxy-16 alpha-methylpregna-5,17(20)-dien-20-olate. The subsequent reduction of the 17 alpha-hydroperoxy group and hydrolysis of the 3 beta-acetoxy group afforded 17 alpha-hydroxy-16 alpha-methyl-substituted dehydropregnenolone acetate and its 3-hydroxy analog in high yield.
Products of the decomposition of 3β-acetoxy-17α-hydroperoxy-16α-methylpregn-5-en-20-one
作者:T. S. Kolyvanova、V. I. Bayunova、G. A. Bogdanova、E. F. Kuleshova、G. S. Grinenko
DOI:10.1007/bf00757968
日期:1987.12
Autooxidation of Δ17(20)-20-hydroxy derivatives of steroids. Synthesis of 3β-acetoxy-17α-hydroperoxy-16α-methylpregn-5-en-20-one and its reduction to 17α-hydroxy derivative
作者:T. S. Savinova、N. V. Lukashev、L. D. Huy、I. P. Beletskaya
DOI:10.1134/s1070428011010052
日期:2011.1
An efficient procedure was proposed for the synthesis of 3 beta-acetoxy-17 alpha-hydroperoxy-16 alpha-methyl-pregn-5-en-20-one. Optimal conditions were found for the combined process including 1,4-addition of methyl-magnesium bromide at the Delta(16)-20-oxo fragment of dehydropregnenolone acetate and autooxidation of resulting bromomagnesium 3 beta-acetoxy-16 alpha-methylpregna-5,17(20)-dien-20-olate. The subsequent reduction of the 17 alpha-hydroperoxy group and hydrolysis of the 3 beta-acetoxy group afforded 17 alpha-hydroxy-16 alpha-methyl-substituted dehydropregnenolone acetate and its 3-hydroxy analog in high yield.