Visible-Light-Promoted Remote C–H Functionalization of <i>o</i>-Diazoniaphenyl Alkyl Sulfones
作者:Shaofu Du、Elizabeth Ann Kimball、Justin R. Ragains
DOI:10.1021/acs.orglett.7b02650
日期:2017.10.20
Visible-light irradiation of ortho-diazoniaphenyl alkyl sulfones in the presence of Ru(bpy)32+ results in remote Csp3–H functionalization. Key mechanistic steps in these processes involve intramolecular hydrogen atom transfer from Csp3–H bonds to aryl radicals to generate alkyl/benzyl radicals. Subsequent polar crossover occurs by single-electron oxidation of the alkyl/benzyl radicals to carbenium