A rhodium-catalyzed annulative reaction between azobenzenes and nitrosoarenes has been developed, leading to a series of phenazines in moderate to good yields. This procedure proceeds with sequential chelation-assisted addition of aryl C–H to nitrosoarenes and ring closure by electrophilic attack of azo group to aryl. During this transformation, the azo group served as not only a traceless directing
Synthesis of phenazines by Cu-catalyzed homocoupling of 2-halogen anilines in water
作者:Lintao Yu、Xiangge Zhou、Di Wu、Haifeng Xiang
DOI:10.1016/j.jorganchem.2011.12.030
日期:2012.5
Phenazines are synthesized by Cu-catalyzed homocoupling of 2-iodoanilines or 2-bromoanilines in water in moderate to excellent yields up to 85%. (C) 2011 Elsevier B. V. All rights reserved.