2-Pyridinyl β-ketones as new ligands for room-temperature CuI-catalysed C–N coupling reactions
作者:Deping Wang、Ke Ding
DOI:10.1039/b821212k
日期:——
2-Pyridinyl β-ketones were identified as new efficient ligands for CuI-catalysed N-arylation of aliphatic amines at room temperature with great selectivity and substrate scope tolerance.
A room-temperature and PTC-free copper-catalyzed N-arylation of aliphatic amines in neatwater has been developed. Using a combination of CuI and 6,7-dihydroquinolin-8(5H)-one oxime as the catalyst and KOH as the base, a wide range of aliphatic amines are arylated with various aryl and heteroaryl halides to give the corresponding products in up to 95% yield.
An Air-Stable Nickel(0) Phosphite Precatalyst for Primary Alkylamine C-N Cross-Coupling Reactions
作者:Sven S. Kampmann、Brian W. Skelton、Duncan A. Wild、George A. Koutsantonis、Scott G. Stewart
DOI:10.1002/ejoc.201500734
日期:2015.9
preparation of a new air-stablenickelphosphite based catalyst for unique C–N bond forming processes. Specifically, (BINAP)Ni[P(OPh)3]2, is presented as an effective catalyst for a range of amination reactions between aryl halides and primaryalkylamines. The results are supported by relevant kinetic studies, DFT calculations and a catalytic cycle indicating possible reaction intermediates.
The use of coumarin-based ligands was examined in copper-catalyzed C-N cross-coupling reactions. It was found that 3-acetylcoumarin constituted a new, practical ligand for the copper-catalyzed N-arylation of aliphatic amines and imidazole with aryl iodides at room temperature. Aryl bromides could also be aminated efficiently at 80 ˚C. This readily available catalyst system, namely copper(I) iodide