A chiral synthesis of the Sceletium alkaloid
(-)-mesembranol 1 is described. The cyclohexane ring in 1 is
prepared in an optically active form from D-glucose using
Ferrier’s carbocyclisation, and the critical stereochemistry of
the quaternary carbon in 1 is constructed stereoselectively via
chirality transfer by way of Claisen rearrangement of the
cyclohexenol derivative 14a. The perhydroindole skeleton in 1 is
effectively generated by intramolecular aminomercuriation of the
amino-olefin 18.
本文描述了斯凯莱蒂姆
生物碱(-)-梅森布兰醇1的手性合成。1中的
环己烷环是使用费里尔碳环化反应从
D-葡萄糖制备的光学活性形式,并且1中第四碳的关键立体
化学结构是通过
环己烯醇衍
生物14a的克莱森重排进行手性转移而构建的。1中的全氢化
吲哚骨架是通过
氨基烯烃18的分子内
氨基
汞化反应有效产生的。