Total Synthesis of (±)-Brussonol and (±)-Komaroviquinone via a Regioselective Cross-Electrophile Coupling of Aryl Bromides and Epoxides
作者:Anees Ahmad、Antonio C. B. Burtoloso
DOI:10.1021/acs.orglett.9b02221
日期:2019.8.2
The short and stereoselective syntheses of diterpenes (±)-brussonol and (±)-komaroviquinone, via a Ni-catalyzed epoxide ring-opening approach in the presence of aryl halides, is described. Key steps involve the effective preparation of a challenging hemiacetal intermediate in a single operation, followed by a highly efficient BF3·OEt2-catalyzed Friedel–Craft alkylation, to construct the tricyclic skeleton
描述了在芳基卤化物存在下,通过Ni催化的环氧基开环方法,二萜(±)-布鲁索醇和(±)-komroviquinone的短和立体选择性合成。关键步骤包括在一次操作中有效制备具有挑战性的半缩醛中间体,然后进行高效的BF 3 ·OEt 2催化的Friedel-Craft烷基化反应,以构建这些二萜的三环骨架。合成方法可能为合成含有冰松烷图案的几种天然产物提供一条统一的途径。