作者:Yan Xiao、Xiaopeng Wu、Hepan Wang、Song Sun、Jin-Tao Yu、Jiang Cheng
DOI:10.1021/acs.orglett.9b00502
日期:2019.4.19
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
已开发出铑催化的偶氮苯与亚硝基芳烃之间的环化反应,从而以中等至良好的产率产生了一系列吩嗪。该过程是在亚硝基芳烃上依次螯合辅助添加芳基CH到芳基,并通过偶氮基团对芳基的亲电攻击进行闭环。在这种转化过程中,偶氮基团不仅充当了无痕导向基团,而且还是最终产品的基础。