Efficient palladium-catalyzed amination of aryl chlorides using di(dicyclohexylamino)phenylphosphine as a PN2 ligand
作者:Bo Ram Kim、Su-Dong Cho、Eun Jung Kim、In-Hye Lee、Gi Hyeon Sung、Jeum-Jong Kim、Sang-Gyeong Lee、Yong-Jin Yoon
DOI:10.1016/j.tet.2011.10.059
日期:2012.1
The palladium-catalyzed amination of a variety of aryl chlorides has been accomplished by using di(dicyclohexylamino)phenylphosphine (1) as a bulky electron-rich monoaryl phosphine ligand. The optimized condition for the palladium-catalyzed amination of aryl chloride is the followings: aniline (3.0 mmol, 1.0 equiv), chlorobenzene (3.15 mmol, 1.05 equiv), ligand 1 (1 mol %, 0.03 mmol), (KOBu)-Bu-t (4.5 mmol, 1.5 equiv), Pd-2(dba)(3) (1 mol %, 0.03 mmol), and toluene as solvent at reflux temperature. We report on couplings of various amines or chloroamines with chlorobenzenes and heteroaryl chloride. (C) 2011 Elsevier Ltd. All rights reserved.