Stereochemical course of the chemical and catalytic reduction of 11-oxo-5.alpha.,14.beta.-cholest-8-en-3.beta.-ol. Synthesis of 8.alpha.,9.alpha.,14.beta.-, 8.alpha.,9.beta.,14.beta.-, and 8.beta.,9.alpha.,14.beta.-steroids
Chemical degradation of steroid side chains. Efficient conversion of cholestanol to corticosteroid intermediates.
作者:Breslow Ronald、Link Todd
DOI:10.1016/s0040-4039(00)74674-0
日期:1992.7
17-Chlorosteroids, produced by template-directed halogenation of 9-fluoro 11-oxygenated cholestanols that are themselves produced by template methods, are converted to their 17-keto analogs in high yields (85–91 %) after HCl elimination with DBU, followed by ozonolysis.
Stereochemical course of the chemical and catalytic reduction of 11-oxo-5.alpha.,14.beta.-cholest-8-en-3.beta.-ol. Synthesis of 8.alpha.,9.alpha.,14.beta.-, 8.alpha.,9.beta.,14.beta.-, and 8.beta.,9.alpha.,14.beta.-steroids