SeCl<sub>2</sub>-Mediated Approach Toward Indole-Containing Polysubstituted Selenophenes
作者:Guilherme M. Martins、Davi F. Back、Teodoro S. Kaufman、Claudio C. Silveira
DOI:10.1021/acs.joc.8b00166
日期:2018.3.16
A novel and efficient SeCl2-mediated chalcogenative cyclization strategy toward 3-selenophen-3-yl-1H-indoles from readily available and conveniently substituted propargyl indoles is described. It entails an unprecedented selenirenium-induced 1,2-indolyl shift prompted by the electrophilic addition of SeCl2 to the triple bond of the propargyl indole, followed by cyclization through the intermediacy of a 1-seleno-1,3-diene. The reaction takes place at room temperature and shows excellent selectivity, broad substrate scope, and wide functional group tolerance.