Oxidative Radical Arylation of Anilines with Arylhydrazines and Dioxygen from Air
作者:Josefa Hofmann、Hannelore Jasch、Markus R. Heinrich
DOI:10.1021/jo500063r
日期:2014.3.7
Substituted 2-aminobiphenyls have been prepared from arylhydrazine hydrochlorides and anilines in biphasic radical arylation reactions with dioxygen from air as a most simple and readily available oxidant. Under optimized conditions, the free amino functionality of the aniline leads to high ortho:meta regioselectivities, now even for anilines bearing a donor substituent in the para position. Finally, the mild and metal-free new access to aminobiphenyls was shown to be applicable on a gram scale.