Direct C(sp<sup>3</sup>)–N Radical Coupling: Photocatalytic C–H Functionalization by Unconventional Intermolecular Hydrogen Atom Transfer to Aryl Radical
作者:Jihee Kang、Ho Seong Hwang、Vineet Kumar Soni、Eun Jin Cho
DOI:10.1021/acs.orglett.0c02179
日期:2020.8.7
energy-transfer-driven homolysis followed by decarboxylation generates the persistent iminyl radical and aryl radical, which would undergo an unprecedented intermolecular hydrogen atom abstraction from the alkyl substrate to provide the key C(sp3) radical. Selective radical–radical C–N cross-coupling furnishes imines which are valuable amine building blocks.
通过使用O-苯甲酰肟对简单烷基底物进行光催化C(sp 3)-H活化,已经开发出一种非常规的分子间直接C(sp 3)-N自由基偶联方法。选择性光催化能量转移驱动的均质反应,然后进行脱羧,生成持久的亚氨基和芳基,它们会经历从烷基底物空前的分子间氢原子提取,从而提供关键的C(sp 3)自由基。选择性自由基-自由基C-N交叉偶联提供了亚胺,它们是有价值的胺结构单元。