Visible-Light-Driven Radical Multicomponent Reaction of 2-Vinylanilines, Sulfonyl Chlorides, and Sulfur Ylides for Synthesis of Indolines
作者:Mukund M. D. Pramanik、Fan Yuan、Dong-Mei Yan、Wen-Jing Xiao、Jia-Rong Chen
DOI:10.1021/acs.orglett.0c00602
日期:2020.4.3
A visible-light-driven photoredox-catalyzed multicomponent reaction of 2-vinylanilines, sulfonyl chlorides, and sulfur ylides is described. This protocol features redox-neutral mild conditions, a broad substrate scope, and good functional group tolerance, providing access to various sulfonated 2,3-disubstituted indolines. The product can be transformed to a diverse range of functionalized indoles by
Electrochemical-mediated fixation of CO<sub>2</sub>: three-component synthesis of carbamate compounds from CO<sub>2</sub>, amines and <i>N</i>-alkenylsulfonamides
An electrocatalyzed three-component cascade reaction of CO2, amines, and N-alkenylsulfonamides is developed, providing an environmentally friendly and efficient method of synthesizing a series of new carbamate compounds. This reaction meets the needs of green chemistry and promotes the participation of carbon dioxide in the three-component reaction by electro-oxidation. Pharmacological activity studies
organosulfur compounds, limited examples of transition-metal-catalyzed thiol-ene reactions have been reported. However, in this work, a directing-group-assisted hydrothiolation of styrenes with thiols by photoredox/cobalt catalysis is found to proceed smoothly to afford Markovnikov-type sulfides with excellent regioselectivity.
Iodine-Mediated Electrochemical C(sp<sup>2</sup>)–H Amination: Switchable Synthesis of Indolines and Indoles
作者:Kangfei Hu、Yan Zhang、Zhenghong Zhou、Yu Yang、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/acs.orglett.0c01821
日期:2020.8.7
A metal-free electrochemical intramolecular C(sp2)–Hamination using iodine as a mediator was developed. This method enables a switchable synthesis of indoline and indole derivatives, respectively, from easily available 2-vinyl anilines.