A concise totalsynthesis of the tricyclic terpene cyanthiwigin U has been accomplished in 12 steps and 17% overall yield. The key step of the synthesis is a two-directional tandem metathesis reaction that forms the cyclohepta[e]indene core from a readily available bicyclo[2.2.2]octene.
三环萜烯花青素 U 的简明全合成分 12 步完成,总产率为 17%。合成的关键步骤是双向串联复分解反应,该反应从容易获得的双环 [2.2.2] 辛烯形成环庚 [e] 茚核。