Stereoselective construction of a steroidal side chain containing a 26–27 cyclopropane ring, compound 22, has been achieved by an intramolecular cyclisation of the corresponding β-methylsulfonyloxy cyanide 16, derived from a chiral cyclopentane derivative. Compound 22 has been further utilised in the synthesis of the naturally occurring steroid petrosterol 3.
通过手性
环戊烷衍
生物衍生出的相应 β-甲基磺酰氧基
氰化物 16 的分子内环化反应,实现了含有 26-27
环丙烷环的甾体侧链--化合物 22 的立体选择性构建。化合物 22 还被进一步用于合成天然
甾醇 petrosterol 3。