Steroids. Part XXXV. Preparation of the epimeric 2-hydroxy-19-nor-5α-cholestanes
作者:C. W. Shoppee、J. C. Coll、Ruth E. Lack
DOI:10.1039/j39700001893
日期:——
2β,19-Epoxy-5α-cholestane, readily obtained from 5α-cholestan-2β-ol by treatment with lead tetra-acetate, on acetolysis with acetic anhydride catalysed by pyridinium hydrochloride or by boron trifluoride gave a variety of products, from which were derived 5α-cholestan-19-oic acids, 5α-cholest-1- and -2-en-19-aldehydes, and 5α-cholestan-19-ols. 2α-Acetoxy- and 2α-methoxy-5α-cholestan-19-oic acids resisted