cyanomethylenetrimethylphosphorane (CMMP), mediated the direct transformation of primary and secondary alcohols into the corresponding nitriles in the presence of acetone cyanohydrin. This type of cyanation process can convert 3β-cholestanol to 3α-cyanocholestane in high yield with complete Walden inversion.
一些新的Mitsunobu试剂,特别是N,N,N',N'-四甲基偶氮二甲酰胺(TMAD)-
三丁基膦(
TBP)和
氰基亚甲基三甲基
磷烷(CMMP),在
丙酮氰醇存在下介导伯醇和仲醇直接转化为相应的腈。 。这类
氰化过程可将Walter完全倒置,以高收率将3β-
胆甾醇转化为3α-
氰基胆甾烷。