Visible-Light-Driven Difluoromethylation of Isocyanides with <i>S</i>-(Difluoromethyl)diarylsulfonium Salt: Access to a Wide Variety of Difluoromethylated Phenanthridines and Isoquinolines
作者:Wen-Bing Qin、Wei Xiong、Xin Li、Jia-Yi Chen、Li-Ting Lin、Henry N. C. Wong、Guo-Kai Liu
DOI:10.1021/acs.joc.0c00816
日期:2020.8.21
variety of difluoromethylated phenanthridines and isoquinolines is herein described. Electrophilic S-(difluoromethyl)diarylsulfonium salt proved to be a good difluoromethyl radical precursor under photoredox catalysis. A broad range of isocyanides were tolerated to furnish the corresponding difluoromethylated phenanthridines, isoquinolines, furo[3,2-c]pyridine, and pyrido[3,4-b]indole in moderate to
本文描述了一种有效的方法,将可见光驱动的
异氰酸酯基自由基二
氟甲基化处理,以使用各种二
氟甲基化
菲啶和
异喹啉。在光氧化还原催化下,亲电S-(二
氟甲基)二芳基ulf盐被证明是良好的
二氟甲基自由基前体。在温和的条件下,宽范围的异
氰化物可以中等至极好的收率提供相应的二
氟甲基化
菲啶,
异喹啉,
呋喃[3,2- c ]
吡啶和
吡啶并[3,4- b ]
吲哚。还提出了一个合理的机制。