Direct C(sp<sup>3</sup>)–H Arylation of Unprotected Benzyl Anilines and Alkylarenes by Organocatalysis under Visible Light
作者:Cheng Huang、Peng Xiao、Zhong-Ming Ye、Chen-Lu Wang、Chen Kang、Sheng Tang、Zhenhong Wei、Hu Cai
DOI:10.1021/acs.orglett.3c03980
日期:2024.1.12
alkylarenes via consecutive photoinduced electron transfer by visiblelight irradiation. Reductive quenching cycles and radical–radical cross-coupling were involved, and electron paramagnetic resonance experiments provide evidence for the formation of radical intermediates formed in situ. The protocol highlights transition metalfree, external oxidantfree, broad substrate scope, and high efficiency (>60 examples
Oxidative debenzylation of N-benzyl aromatic amines using DMSO as a non-toxic oxidant and catalyzed by TsOH gave N-phenylimines, which were spontaneously hydrolyzed to form anilines and benzaldehydes in good yields. This reaction employs mild, metal-free conditions. The conditions are also suitable for the debenzylation of benzylphenylethers.