Palladium(II)-Catalyzed Cyclization Reaction of 2-(Alk-2′-ynyl- oxy)benzonitriles or 2-(Alk-2′-ynylamino)benzonitriles: A Facile Way to 2<i>H</i>-Chromene and 1,2-Dihydroquinoline Derivatives
作者:Guoqin Xia、Xiuling Han、Xiyan Lu
DOI:10.1002/adsc.201200445
日期:2012.10.8
2-dihydroquinolines from palladium(II)-catalyzed tandem reactions of 2-(alk-2′-ynyloxy)benzonitriles or 2-(alk-2′-ynylamino)benzonitriles was developed. This tandem reaction involves an intermolecular trans-acetoxypalladation of an alkyne followed by an addition to the nitrile group to quench the carbon-palladium bond and complete the catalytic cycle without the necessity of a redoxsystem.