title: Transition-metal-free, visible-light induced cyclization of arylsulfonyl chlorides with o-azidoarylalkynes: a regiospecific route to unsymmetrical 2,3-disubstituted indoles.
abstract: A visible-light-catalyzed synthesis of unsymmetrical 2,3-diaryl-substituted indoles from arylsulfonyl chlorides and o-azidoarylalkynes at room temperature has been discovered. This transformation exhibits excellent substrate scope and functional group tolerance. The use of inexpensive eosin Y as the catalyst with easy operation makes this protocol very practical.
authors.affiliation: Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming, Yunnan 650500, China. gulijun2005@126.com.
authors.forename: Lijun
authors.initials: L
authors.lastname: Gu
authors.forename: Cheng
authors.initials: C
authors.lastname: Jin
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Yonghui
authors.initials: Y
authors.lastname: He
authors.forename: Guangyu
authors.initials: G
authors.lastname: Yang
authors.forename: Ganpeng
authors.initials: G
authors.lastname: Li