Efficient palladium-catalyzed amination of aryl chlorides using di(dicyclohexylamino)phenylphosphine as a PN2 ligand
摘要:
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.
N -(Pyridin-2-yl)benzamide: efficient ligand for the nickel catalyzed Chan–Lam cross-coupling reaction
作者:Srinivas Keesara
DOI:10.1016/j.tetlet.2015.10.047
日期:2015.12
An efficient protocol for the Chan–Lam cross-coupling reactions of arylboronicacids with aryl or alkyl amines has been developed by employing simple N-(pyridin-2-yl)benzamide ligand with Ni(OAc)2·4H2O in the presence of TMG base. The reaction proceeded well with high yields by employing various N-nucleophiles at low catalytic loadings.