A catalytic amount of 1,2-bis(diphenylphosphino)benzene (DPPBz) achieves selective cleavage of sp3-carbon–halogen bond in the iron-catalysed cross-coupling between polyfluorinated arylzinc reagents and alkyl halides, which was unachievable with a stoichiometric modifier such as TMEDA; the selective iron-catalysed fluoroaromatic coupling provides easy and practical access to polyfluorinated aromatic compounds.
Synthesis of 4-Substituted Styrene Compounds via Palladium-Catalyzed Suzuki Coupling Reaction Using Free Phosphine Ligand in Air
作者:Yan Liu、Jinqu Wang
DOI:10.1080/00397910902883611
日期:2009.12.30
The air-stable and easy to prepare nonsymmetric Schiff base ligands have been synthesized and proven to be efficient ligands for Suzuki cross-coupling reaction between aryl bromides and arylboronic acids using PdCl2(CH3CN)2 as palladium source under aerobic conditions. The coupling reaction proceeded smoothly using N-[(3,4-dimethoxyphenyl)methylene]-1,2-benzenediamine (L3) as ligand under mild conditions to provide 4-substituted styrene compounds in good yields.
Synthesis of 4-Vinylbiphenyl Derivatives by Pd(II)-1,2-Diamino-cyclohexane Complex Catalyzed Suzuki-Miyaura Reaction
作者:Y. Liu、X.W. Ma、P. Liu、J.W. Xie、B. Dai
DOI:10.14233/ajchem.2014.16972
日期:——
A series of 4-vinylbiphenyl derivatives were synthesized by Pd(II)-1,2-diaminocyclohexane complex catalyzed Suzuki-Miyaura reactions in the presence of K3PO4·3H2O as base in toluene at 80 °C and the corresponding products achieved 39-95 % yields. According to this efficient C-C bond-forming method, the obtained yields of 4-vinylbiphenyl liquid crystal compounds were up to 89 %.