Visible-Light-Induced Radical Cascade Reaction of 1-Allyl-2-ethynylbenzoimidazoles with Thiosulfonates to Assemble Thiosulfonylated Pyrrolo[1,2-<i>a</i>]benzimidazoles
作者:Yan Liu、Niuniu Zhang、Yanli Xu、Yanyan Chen
DOI:10.1021/acs.joc.1c02082
日期:2021.12.3
A visible-light-induced radical domino reaction of 1-allyl-2-ethynylbenzoimidazoles with thiosulfonates was developed, which generated the thiosulfonylated pyrrolo[1,2-a]benzimidazoles in moderate to good yields. This reaction proceeded under transition-metal-free conditions with good functional group tolerance and high regioselectivity. The possible pathway involved thiosulfonates were activated through
开发了可见光诱导的 1-烯丙基-2-乙炔基苯并咪唑与硫代磺酸盐的自由基多米诺反应,以中等至良好的产率生成硫代磺酰化吡咯并[1,2- a ]苯并咪唑。该反应在不含过渡金属的条件下进行,具有良好的官能团耐受性和高区域选择性。通过光催化促进的能量转移途径激活了涉及硫代磺酸盐的可能途径。