cyclopropylideneethanol 11 as a key step, was converted into the olefinic cyclobutanone 20 which was then transformed into the ketonic lactone 22via the olefinic lactone 21. This constitutes the formal total synthesis of (−)-mesembrine (1).
通过串联不对称环氧化和环丙基亚乙基
乙醇11的1,2-重排制备的光学纯砜15被转化为烯属
环丁酮20,然后其通过烯属内酯21转化为酮内酯22。这构成了(-)-中间膜(1)的正式全合成。