Aqueous Copper Nitrate Catalyzed Synthesis of 3-Alkylideneoxindoles from α-Diazo-β-ketoanilides
作者:Shanyan Mo、Zhanhui Yang、Jiaxi Xu
DOI:10.1002/ejoc.201402206
日期:2014.6
An economical, practical, and green protocol with which to synthesize 3-alkylideneoxindolesfromα-diazo-β-ketoanilides has been developed. The approach employs inexpensive Cu(NO3)2·3H2O as catalyst and environmentally friendly water as solvent, and achieves moderate to excellent yields. The method has good tolerance to a range of N-alkyl and N-aryl groups, including electron-withdrawing and electron-donating