Visible Light-Mediated Intermolecular C−H Functionalization of Electron-Rich Heterocycles with Malonates
作者:Laura Furst、Bryan S. Matsuura、Jagan M. R. Narayanam、Joseph W. Tucker、Corey R. J. Stephenson
DOI:10.1021/ol101146f
日期:2010.7.2
The photoredox-mediated direct intermolecular C−H functionalization of substituted indoles, pyrroles, and furans with diethyl bromomalonate is described, utilizing the visible light-induced reductive quenching pathway of Ru(bpy)3Cl2. An analysis of reductive quenchers and mechanistic considerations has led to an optimized protocol for the heteroaromatic alkylations, providing products in good yields
描述了利用溴化丙二酸二乙酯的光氧化还原介导的取代吲哚,吡咯和呋喃的分子间直接CHH功能化,利用Ru(bpy)3 Cl 2的可见光诱导的还原淬灭途径。还原性淬灭剂和机理考虑因素的分析已导致杂芳烷基化的优化方案,以高收率和区域选择性提供产物,并成功消除了先前观察到的竞争性副反应。该方法学因其中性条件,在室温下的活性,低催化剂负载量,官能团耐受性和化学选择性而突出。