Abstract
13C‐N.M.R‐Investigations of Steroids. III. Steric Effects of 2,3 Substituted Cholestane Derivatives and their Application for the Configurational AnalysisThe steric effects on 13C chemical shifts and their use for the determination of the substituent configuration of 5α and 5β‐cholestane (cholestane and coprostane), their 3‐OH derivatives and some 2‐mono‐ and 2,3‐disubstituted cholestanes are investigated. Because the substituent effect of the C8H17 group at C‐17 of cholestane and coprostane is very small for the carbon atoms of the rings A and B of the steroid skeleton, the discussed results are useful also for androstane derivatives with and without substitutions at the ring D.
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