Stereochemical course of the catalytic reduction and of the acidic isomerization of 14.beta. steroids. Synthesis of .DELTA.8-14.beta. and 8.alpha., 9.alpha., 14.beta. steroids
Hydroboration of 5 alpha-cholest-8-ene, 5 alpha,14 beta-cholest-8-ene and 5 alpha,14 beta-cholest-7-ene provides a simple route to oxygenated steroids with 14 beta- and 8 alpha,14 beta- unnatural stereochemistry.
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