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
一种温和而有效的方法,使用容易获得的1-芳基-2,3-烯醇和未保护的N吲哚,Au +催化的环化和芳构化,以提供具有优异选择性的最终[4C + 2C]产品咔唑4,被报道。该反应显示出优异的区域选择性,并使NH单元不受保护地进行反应。已经提出了涉及螺多环中间体的机理,并且还证明了其合成应用。