Copper-Catalyzed Direct Oxidative C–H Amination of Benzoxazoles with Formamides or Secondary Amines under Mild Conditions
作者:Yaming Li、Yusheng Xie、Rong Zhang、Kun Jin、Xiuna Wang、Chunying Duan
DOI:10.1021/jo200447x
日期:2011.7.1
A facile, efficient, and practical method for copper-catalyzed direct C–H amination of benzoxazoles with formamides or secondary amines has been developed. The system can be performed in the absence of external base and only requires O2 or even air as oxidant. A variety of substituted benzoxazol-2-amines were synthesized with moderate to excellent yield.
已经开发了一种简便,有效且实用的方法,用于铜催化的苯甲恶唑与甲酰胺或仲胺的CH–H氨化反应。该系统可以在没有外部碱的情况下进行,仅需要O 2或什至空气作为氧化剂。合成了各种取代的苯并恶唑-2-胺,产率中等至优异。