Intermolecular Markovnikov-Selective Hydroacylation of Olefins Catalyzed by a Cationic Ruthenium–Hydride Complex
作者:Junghwa Kim、Chae S. Yi
DOI:10.1021/acscatal.6b00856
日期:2016.5.6
The cationic Ru–H complex was found to be an effective catalyst for the intermolecularhydroacylation of aryl-substituted olefins with aldehydes to form branched ketone products. The preliminary kinetic and spectroscopic studies elucidated a ruthenium-acyl complex as the key intermediate species. The catalytic method directly afforded branched ketone products in a highly regioselective manner while
The nickel‐catalyzed α‐arylation of ketones with readily available phenolderivatives (esters and carbamates) provides access to useful α‐arylketones. For this transformation, 3,4‐bis(dicyclohexylphosphino)thiophene (dcypt) was identified as a new, enabling, air‐stable ligand for this transformation. The intermediate of an assumed CO oxidative addition was isolated and characterized by X‐ray crystal‐structure
Catalytic Alkyne Arylation Using Traceless Directing Groups
作者:Jung‐Woo Park、Bubwoong Kang、Vy M. Dong
DOI:10.1002/anie.201804955
日期:2018.10.8
to generate enamines, which are then hydrolyzed to either α‐arylphenones or α,α‐diarylketones. This Pd‐catalyzed method overcomes established known pathways to enable the use of amines as tracelessdirectinggroups for C−C bond formation.
(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.
Palladium-Catalyzed Mono-α-Arylation of Acetone with Aryl Imidazolylsulfonates
作者:Lutz Ackermann、Vaibhav P. Mehta
DOI:10.1002/chem.201201394
日期:2012.8.13
Set the ace(tone): A palladium catalyst derived from the bidentate XantPhos ligand and Pd(OAc)2 has enabled broadly applicable mono‐α‐arylations of acetone to be performed with air‐ and moisture‐stable arylimidazolylsulfonates as most user‐friendly electrophiles (see scheme).