Trimethylsilylcyanide addition to different carbonyl moieties, i.e. saturated ketones, an enone and an aldehyde, at the steroid side-chain, was studied in the presence of a convenient catalyst. Depending on the nature of the carbonyl group, different outcomes were noticed. Saturated 20-keto pregnanes yielded epimerically pure silylated cyanohydrins, being the absolute configuration unambiguously established by X-ray
在便利的催化剂存在下,研究了在
固醇侧链上将三甲基甲
硅烷基
氰化物加到不同的羰基部分,即饱和酮,烯酮和醛上。取决于羰基基团的性质,注意到不同的结果。饱和的20-酮孕烷产生差向异构纯的甲
硅烷基化的
氰醇,这是通过X射线晶体学分析明确确定的绝对构型。