The tricyclic core of 5α-capnellenols was synthesized using an asymmetric Heck reaction-carbanion capture process and an intramolecular nitrile oxide cycloaddition as key ring construction steps. Moreover, the desired C5-α-OH product was obtained through a retroaldol and aldol epimerization process of the C5-β-OH tricyclic compound.
5α-capnellenols 的
三环核心是使用不对称 Heck 反应碳负离子捕获过程和分子内氧化腈环加成作为关键环构建步骤合成的。此外,所需的C5-α-OH 产物是通过C5-β-OH
三环化合物的retroaldol 和aldol差向异构化过程获得的。