期刊
TETRAHEDRON
卷 70, 期 32, 页码 4754-4759出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2014.05.048
关键词
Palladium; Amination; Triphenylphosphine; Diarylation; Monoarylation
资金
- National Natural Science Foundation of China [21272156]
- Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials [2012MCIMKF01]
A readily accessible catalytic system, PdCl2(Ph3P)(2)/Ph3P, was developed for the selective arylation of primary anilines with aryl bromides. The strong influence of solvents and bases on the catalytic activity was observed. In refluxing o-xylene, triphenylphosphine shows high efficiency for Pd-catalyzed intermolecular amination reactions. By changing the bases, mono- and diarylation of primary amines could be selectively achieved in high yields. Moreover, the catalytic system showed good toleration for the steric hindrance of anilines. A series of N,N,N',N'-tetraaryl-1,1'-biphenyl-4,4'-diamines, important intermediates of OLED hole transport materials, were synthesized facilely via coupling reactions between 4,4'-diaminobiphenyls and aryl bromides. (C) 2014 Elsevier Ltd. All rights reserved.
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