Ligand-promoted, copper nanoparticles catalyzed one-pot synthesis of substituted benzoxazoles from 2-bromoanilines and acyl chlorides
作者:Yong Wang、Chaolong Wu、Shoujie Nie、Dingjian Xu、Min Yu、Xiaoquan Yao
DOI:10.1016/j.tetlet.2015.10.078
日期:2015.12
A facile, highly efficient, and practical one-pot synthetic strategy for benzoxazoles was developed by using copper nanoparticles as a catalyst with o-bromoanilines and acyl chlorides as starting materials. With the promotion of 1,10-phenanthroline ligand, the copper nanoparticles catalyst showed highly catalytic activity under mild conditions. This methodology is tolerant of a wide variety of functional groups and gives good to excellent yields in most examples. Furthermore, the solid catalyst could be recovered and reused conveniently several times with satisfactory yields. (C) 2015 Elsevier Ltd. All rights reserved.