Cobalt-Catalyzed Aerobic Oxidative Cyclization of 2-Aminophenols with Isonitriles: 2-Aminophenol Enabled O<sub>2</sub> Activation by Cobalt(II)
作者:Jiaqi Liu、Jessica M. Hoover
DOI:10.1021/acs.orglett.9b01384
日期:2019.6.21
An aerobic cobalt-catalyzed oxidative cyclization of 2-aminophenols and isonitriles is reported. These additive-free conditions furnish a variety of substituted 2-aminobenzoxazoles in moderate to excellent yields. A series of control experiments and spectroscopic studies point to the importance of 2-aminophenol coordination in enabling the aerobic oxidation of cobalt(II).