Gold-Catalyzed [4+3] Cycloaddition/C-H Functionalization Cascade: Regio- and Diastereoselective Route to Cyclohepta[<i>b</i>
]indoles
作者:Yangyan Li、Chao-Ze Zhu、Junliang Zhang
DOI:10.1002/ejoc.201701441
日期:2017.12.8
For the first time, a highly regio- and diastereoselective [4+3] annulation of propargylic esters with 2-vinylindoles was developed by using PicAuCl2 as the catalyst under mild reaction conditions. This reaction provides an efficient access to densely functionalized cyclohepta[b]indoles with excellent yields which incorporated with two molecules of propargylic esters. By hydrolysis of the two vinyl