Rhodium(III)-Catalyzed Oxidative Annulation of 2,2′-Bipyridine N-Oxides with Alkynes via Dual C–H Bond Activation
作者:Xin Xu、Haoqiang Zhao、Jianbin Xu、Changjun Chen、Yixiao Pan、Zhenli Luo、Zongyao Zhang、Huanrong Li、Lijin Xu
DOI:10.1021/acs.orglett.8b01434
日期:2018.7.6
Rh(III)-catalyzed switchable annulation of 2,2′-bipyridine N-oxides with internal alkynes via dual C–H bond activation has been developed. Tuning the reaction conditions enabled the reaction pathway to be switched between rollover and nonrollover annulation, delivering 5,6-disubstituted-1,10-phenanthrolines and 5,6,7,8-tetrasubstituted-1-(pyridin-2-yl)isoquinoline 2-oxides in high yields, respectively
已经开发了Rh(III)通过双C–H键活化与内部炔烃催化的2,2'-联吡啶N-氧化物的可转换环。调节反应条件使反应路径可以在翻转和非翻转环空之间切换,从而提供5,6-二取代的-1,10-菲咯啉和5,6,7,8-四取代的-1-(吡啶-2-基)异喹啉分别以高收率获得2-氧化物。该程序具有出色的区域选择性,广泛的底物范围和对官能团的高度耐受性。在催化反应中证明了这些获得的产物的合成效用。