The influence of the nature of phosphine ligand on palladium catalysts for cross-coupling of weakly nucleophilic potassium pentafluorophenyltrifluoroborate with ArHal and PhCH2Hal (Hal=Br, Cl)
作者:Anton Yu. Shabalin、Nicolay Yu. Adonin、Vadim V. Bardin、Valentin N. Parmon
DOI:10.1016/j.tet.2014.04.019
日期:2014.6
the nature of bulky phosphines used as ligands. As a result, conditions for involving the electron-deficient organoboron reagent—potassium pentafluorophenyltrifluoroborate—in the palladium-catalyzed cross-coupling with aryl bromides and arylchlorides were identified. It was demonstrated that the chosen conditions are appropriate for the reaction of K[C6F5BF3] with benzyl chloride and benzyl bromide
Pd-Catalyzed Decarboxylative Cross Coupling of Potassium Polyfluorobenzoates with Aryl Bromides, Chlorides, and Triflates
作者:Rui Shang、Qing Xu、Yuan-Ye Jiang、Yan Wang、Lei Liu
DOI:10.1021/ol100008q
日期:2010.3.5
Pd-catalyzed decarboxylative cross coupling of potassiumpolyfluorobenzoates with arylbromides, chlorides, and triflates is achieved by using diglyme as the solvent. The reaction is useful for synthesis of polyfluorobiaryls from readily accessible and nonvolatile polyfluorobenzoate salts. Unlike the Cu-catalyzed decarboxylation cross coupling where oxidative addition is the rate-limiting step, in
Remarkably Effective Phosphanes Simply with a PPh<sub>2</sub>Moiety: Application to Pd-Catalysed Cross-Coupling Reactions for Tetra-<i>ortho</i>-substituted Biaryl Syntheses
作者:Chau Ming So、Wing Kin Chow、Pui Ying Choy、Chak Po Lau、Fuk Yee Kwong
DOI:10.1002/chem.201000723
日期:2010.7.19
Expanding the horizons of ArPPh2: New applications of triarylphosphane ligands are presented. The Pd–L1 and Pd–L2 complexes offer exceptionally high activity in Suzuki–Miyaura cross‐couplings of aryl chlorides. The extremely congested synthesis of tetra‐ortho‐substituted biaryl compounds is achieved for the first time by simply using triarylphosphane ligands.
A cooperative Pd–Cu system for direct C–H bond arylation
作者:Mathieu Lesieur、Faïma Lazreg、Catherine S. J. Cazin
DOI:10.1039/c4cc03201b
日期:——
A dual metal system bearing NHCs has been developed for the challenging construction of C–C bonds from arenes and heteroarenes.
已开发出一种双金属系统,其中含有NHCs,用于从芳烃和杂环芳烃中挑战性地构建C-C键。
Sterically Demanding, Bioxazoline-Derived N-Heterocyclic Carbene Ligands with Restricted Flexibility for Catalysis
作者:Gereon Altenhoff、Richard Goddard、Christian W. Lehmann、Frank Glorius
DOI:10.1021/ja045349r
日期:2004.11.1
A unique family of N-heterocycliccarbenes derived from bioxazolines (IBiox) suitable for application in transition-metal catalysis is described. The ligands are electron rich, sterically demanding, and have restricted flexibility. Their usefulness has been demonstrated in the Suzuki-Miyaura cross-coupling of stericallyhinderedarylchlorides and boronic acids. For the first time, tetraortho-substituted