Carbazoles from the [4C+2C] Reaction of 2,3-Allenols with Indoles
作者:Binjie Guo、Xin Huang、Chunling Fu、Shengming Ma
DOI:10.1002/chem.201604317
日期:2016.12.19
A mild and efficient method using readily available 1‐aryl‐2,3‐allenols and unprotected‐N indoles, Au+‐catalyzed cyclization, and aromatization to afford the final [4C+2C] products, carbazoles 4, with an excellent selectivity, is reported. The reaction demonstrates excellent regioselectivity and allows the N−H unit to undergo reactivity unprotected. A mechanism involving a spiropolycyclic intermediate