Synthesis of Indole-Fused Oxepines via C–H Activation Initiated Diastereoselective [5 + 2] Annulation of Indoles with 1,6-Enynes
作者:Xiaoli Huang、Yan Shi、Yongzhuang Wang、Jiao Jiao、Yuhai Tang、Jing Li、Silong Xu、Yang Li
DOI:10.1021/acs.orglett.1c03106
日期:2021.11.5
A rhodium-catalyzed diastereoselective formal [5 + 2] annulation of indoles with cyclohexadienone-containing 1,6-enynes has been established via indole 2,3-difunctionalization. The reaction, probably proceeding through tandem indole C2–H alkenylation and intramolecular Friedel–Crafts alkylation relay, provides rapid construction of indole-fused oxepines in good to excellent yields with a broad substrate