Visible-light-induced synthesis of benzothiophenes and benzoselenophenes via the annulation of thiophenols or 1,2-diphenyldiselane with alkynes
作者:Xiao-Feng Xia、Guo-Wei Zhang、Su-Li Zhu
DOI:10.1016/j.tet.2017.03.053
日期:2017.5
An effective metal-free photoredox-mediated tandem addition/cyclization reaction of thiophenols or 1,2-diphenyldiselane with alkynes leads to 2,3-disubstituted benzothiophenes and benzoselenophenes. Blue light irradiation of the organic dye, Mes-Acr-Me+, initiates the photoredox catalysis. A series of functional groups could be tolerated under ambient conditions, and good to excellent yields were generated. (C) 2017 Elsevier Ltd. All rights reserved.