芳基
催化作用
化学
电子转移
光化学
芳基
光催化
组合化学
质子耦合电子转移
有机化学
光催化
烷基
作者
Nicholas D. Chiappini,Eric P. Geunes,Ethan T. Bodak,Robert R. Knowles
标识
DOI:10.1021/acscatal.3c05598
摘要
A light-driven method for the generation of aryl radicals from triarylbismuth(III) and (V) reagents is described. Aryl radical generation is proposed to occur through the ligand-assisted mesolytic cleavage of an organobismuth(IV) intermediate generated from either oxidation of BiIII or reduction of BiV. This mode of aryl radical generation is demonstrated to be compatible with a range of bimolecular radical arylations, including hydroarylation of electron-deficient olefins and arylation of diboronates, disulfides, sulfonyl cyanides, phosphites, and isocyanides. The intermediacy of an aryl radical is supported by radical trapping and radical clock experiments, and BiIV–aryl mesolysis is supported computationally.
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