Herein, we describe a photoinitiated and regioselective synthesis of 2-substituted indoles under mild reaction conditions. This biologically privileged scaffold was accessed in good yields from N-aroylbenzotriazoles, a quencher class previously identified using our mechanism-based luminescence screening, and terminal alkynes in the presence of a photocatalyst and blue light irradiation. This straightforward
Diverse Visible‐Light‐Promoted Functionalizations of Benzotriazoles Inspired by Mechanism‐Based Luminescence Screening
作者:Michael Teders、Adrián Gómez‐Suárez、Lena Pitzer、Matthew N. Hopkinson、Frank Glorius
DOI:10.1002/anie.201609393
日期:2017.1.16
Three new visible‐light‐promotedfunctionalizations of benzotriazole substrates were discovered using a mechanism‐basedscreening method. ortho‐Thiolated, borylated, and alkylated N‐arylbenzamide products were obtained under mild reaction conditions in a new denitrogenative synthetic approach to functionalized aniline derivatives. The functional group tolerance of the borylation reaction was further
A visible-light-induced denitrogenative phosphorylation of benzotriazoles is presented, in which diverse substituted aryl phosphonates could be obtained in good to excellent yields. This efficient protocol exhibits good tolerance with various functional groups. Furthermore, the utility of this photochemical protocol is demonstrated by a gram-scale reaction, and a reasonable mechanism is proposed.