The Preparation of Δ<sup>5</sup>-Androsten-17β-ol-3,7-dione 17-Acetate 3-Ethylene Ketal and Some of its Reactions
作者:P. N. Rao、P. Kurath
DOI:10.1021/ja01602a053
日期:1956.11
Oxidation of 3-Enol Derivatives of 4-En-3-oxo-steroids by tert-Butyl Chromate.
作者:Kikuo Yasuda
DOI:10.1248/cpb.11.1167
日期:——
3-Enol acetates of some 4-en-3-oxo-steroids were oxidized to the corresponding 7-ones with t-butyl chromate and 3-enol methyl ethers were to the corresponding 4-ene-3, 6-diones, 6β-hydroxy-4-en-3-ones or 4, 6-dien-3-ones according to the reaction conditions. 3-Enol methyl ethers were prepared with methyl orthoformate in dioxane by catalysis of p-toluenesulfonic acid. 17α-Acetoxy-5α, 6β-dichloropregnane-3, 20-dione was converted into 3-methoxy-6-chloro-17α-acetoxypregna-3, 5-dien-20-one in one step.