Merging Visible Light with Cross-Coupling: The Photochemical Direct C–H Difluoroalkylation of Imidazopyridines
作者:Chuan-Hua Qu、Gui-Ting Song、Jia Xu、Wei Yan、Cheng-He Zhou、Hong-Yu Li、Zhong-Zhu Chen、Zhi-Gang Xu
DOI:10.1021/acs.orglett.9b02487
日期:2019.10.18
A transition-metal-free protocol for the difluoroalkylation of imidazopyridines with bromodifluoroaryl ketones promoted by visible light irradiation is presented. This protocol is distinguished by simple, mild, and catalyst-free reaction conditions with a wide reaction scope, which is complementary to existing difluoroalkylation strategies by photoredox scenarios. Additionally, this protocol potentially
提出了一种无过渡金属的方案,用于通过可见光照射促进咪唑并吡啶与溴二氟芳基酮的二氟烷基化。该方案的特点是反应条件简单,反应温和且无催化剂,反应范围广,是光氧化还原方案对现有二氟烷基化策略的补充。此外,该协议可能提供一种简化含二氟部分化合物合成的新方法。