Abstract
The hydroxylations of seven diketones and keto-alcohols derived from 5α-androstane with Rhizopus arrhizus and Rhizopus circinnans are similar to, but not identical with, those observed previously using Rhizopus nigricans. R. circinnans is useful for introducing a 4α-hydroxy-group into 5α-androstane-11,17-dione.N.m.r. shift values are given for the influence on steroidal 18- and 19-H signals of various single substituents, and of systems containing two or more substituents whose effects are not additive.
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Schedule a callMore From: Journal of the Chemical Society. Perkin transactions 1
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