Unsymmetric, N-substituted benzimidazoles and imidazopyridines can be prepared directly from 2-halonitroarenes and amides through Pd(TFA) 2 /(R)-BINAP-catalyzed cross-coupling and subsequent reductive aminocyclization. This sequence can be conducted by a one-pot procedure. The method is versatile and allows the straightforward, regioselective preparation of these important nitrogen heterocycles.
Selective Hydrolysis of Primary and Secondary Amides Enabled by Visible Light
作者:Wenzhang Xiong、Yichun Wang、Xiaobo Yang、Wenbo H. Liu
DOI:10.1021/acs.orglett.3c00354
日期:——
Amide hydrolysis is a fundamentally important transformation in organic chemistry. Developing hydrolysis procedures under mild conditions with a broad substrate scope is desirable. Herein, by leveraging a photoresponsive auxiliary o-nitroanilide, we established a mild two-step protocol for the hydrolysis of primary and secondaryamides. This protocol is driven by visible light irradiation at room temperature