Metal-Free Addition of Alkyl Bromides to Access 3,3-Disubstituted Quinoxalinones Enabled by Visible-Light Photoredox Catalysis
作者:Jennie Liao、David N. Hunter、Ugochinyere Nancy Oloyede、Joseph W. McLaughlin、Cheng Wang、Abdellatif El Marrouni
DOI:10.1021/acs.joc.3c01054
日期:2023.8.18
A metal-free addition of unactivated alkyl bromides to quinoxalin-2(1H)-ones is described. This method enables the construction of valuable 3,3-disubstituted dihydroquinoxalin-2(1H)-ones bearing quaternary carbon centers under mild, visible-light photoredox catalysis. High functional group tolerance is observed in both the quinoxalinone and alkyl bromide partners. The ability to scale up this method
描述了未活化的烷基溴与喹喔啉-2(1H)-酮的无金属加成。该方法能够在温和的可见光光氧化还原催化下构建有价值的带有季碳中心的3,3-二取代二氢喹喔啉-2(1 H )-酮。在喹喔啉酮和烷基溴伙伴中观察到高官能团耐受性。在光流条件下证明了该方法的放大能力,以实现克级合成。