摘要:
The combination use of Ni(cod)(2) and N,N-1,3-bis(2,6-diisopropylphenyl)-4-imidazoline-2-ylidene as a catalyst successfully gave unsymmetrical N,N-diaryl-N',N'-diphenyl-1,1'-biphenyl-4,4'-diamines through the arylation of bromomagnesium diarylamide with 1-(4'-diphenylamino-1,1'-biphenylyl) N,N-dimethylsulfamate. This Ni catalyst and Grignard reagents of diaryl or monoarylamides were also useful in the syntheses of various triarylamines and diarylamines from corresponding aryl N,N-dimethylsulfamates. (C) 2012 Elsevier Ltd. All rights reserved.