The synthesis of a series of 5‐(alkynyl) dibenzothiophenium triflates, prepared from dibenzo[b,d]thiophene 5‐oxide and the corresponding trimethylsilyl‐substituted alkynes is reported. Their structures were determined by X‐ray crystallography, and their reactivities as electrophilic alkynylation reagents evaluated. Their broad substrate scope and functional‐group tolerance illustrate their potential
Direct Synthesis of Sulfonamides via Synergetic Photoredox and Copper Catalysis
作者:Mingjun Zhang、Lixia Liu、Beibei Wang、Yin Yang、Yuxiu Liu、Ziwen Wang、Qingmin Wang
DOI:10.1021/acscatal.3c03096
日期:2023.9.1
functionality, amine nucleophilicity, and functional group compatibility. Herein, we report the use of synergetic photoredox and copper catalysis to synthesize sulfonamides from a variety of arylradical precursors, readily available amines, and a sulfur dioxide source in air at room temperature. The reactions proceeded smoothly with various electron-rich and electron-deficient amines to generate sulfonamides