(IPr)Pd(acac)Cl: An Easily Synthesized, Efficient, and Versatile Precatalyst for C−N and C−C Bond Formation
作者:Nicolas Marion、Elise C. Ecarnot、Oscar Navarro、Dino Amoroso、Andrew Bell、Steven P. Nolan
DOI:10.1021/jo060190h
日期:2006.5.1
and IPr·HCl [acac = acetylacetonate; IPr = N,N‘-bis(2,6-diisopropylphenyl)imidazol-2-ylidene], has been developed. The resulting complex, (IPr)Pd(acac)Cl (1), has proven to be a highly active PdII precatalyst in the Buchwald−Hartwig and the α-ketone arylation reactions. A wide range of substrates has been screened, including unactivated, sterically hindered, and heterocyclic aryl chlorides.
Nickel-Catalyzed Transformation of Aryl 2-Pyridyl Ethers via Cleavage of the Carbon–Oxygen Bond: Synthesis of Mono-α-arylated Ketones
作者:Zhong-Xia Wang、Jing Li
DOI:10.1055/s-0037-1609963
日期:2018.8
aryl 2-pyridyl ethers with propiophenone and acetophenone derivatives via C–OPy bond cleavage is performed in the presence of t-BuOLi to give mono-α-arylated ketones in moderate yields. The method is suitable for electron-rich and electron-poor ethers as well as heteroaryl ethers and tolerates a range of active functional groups. The nickel/IPr-catalyzed reaction of aryl 2-pyridyl ethers with propiophenone
Arylation of both acyclic ketones and primary and secondary amines was achieved using a new, simple, stable, and easy-to-access nickel(II)−halide complex bearing mixed PPh3/N-heterocyclic carbene ligands as a catalyst precursor. Acyclic ketones were first arylated at the α-position with the nickel catalyst. On the other hand, less basic amines, such as diphenylamine and 4-aminobenzophenone, were more
Nickel catalyzed α-arylation of ketones with aryltrimethylammonium triflates
作者:Jing Li、Zhong-Xia Wang
DOI:10.1039/c6ob01299j
日期:——
Nickel-catalyzed α-arylation of ketones involving aromatic C–N cleavage has been accomplished. Intermolecular coupling of aromatic ketones with a variety of aryltrimethylammonium triflates was achieved in the presence of Ni(COD)2, IPr·HCl, and LiOBut, giving α-arylated ketones in reasonable to excellent yields.
α-Arylation of (hetero)aryl ketones in aqueous surfactant media
作者:Alex B. Wood、Daniel E. Roa、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1039/d1gc01572a
日期:——
α-Arylation reactions can be performed in water, enabled by a designer surfactant,under mild conditions and in the absence of organic co-solvents. A multitude of aryl and heteroaryl ketones are amenable to coupling with functionalized aryl halides. Use of a lipophilic base that can gain entry to the micellar inner cores mediates enolization. In some cases, palladium loadings as low as 2500 ppm (0.25