New ligands for copper-catalyzed C–N coupling reactions with aryl halides
作者:Dong Chen、Kai Yang、Hua Xiang、Sheng Jiang
DOI:10.1016/j.tetlet.2012.10.083
日期:2012.12
2-Carbomethoxy-3-hydroxyquinoxaline-di-N-oxide was identified as an efficient novel ligand for the copper-catalyzedcouplingreactions of aryl iodides, bromides, and chlorides with aliphatic amines and N-containing heterocycles under mild conditions. The catalytic system showed great functional-group tolerance and excellent chemoselectivity.