An efficient use of NiCl2·6H2O, for the cross-coupling of arylboronicacids with various N-nucleophiles, has been demonstrated. The method is practical and offers an alternative to the corresponding Cu-mediated Chan–Lam process for the construction of the C–N bond.
Water-soluble palladacycles containing hydroxymethyl groups: synthesis, crystal structures and use as catalysts for amination and Suzuki coupling of reactions
作者:Xin Han、Hong-Mei Li、Chen Xu、Zhi-Qiang Xiao、Zhi-Qiang Wang、Wei-Jun Fu、Xin-Qi Hao、Mao-Ping Song
DOI:10.1007/s11243-016-0036-5
日期:2016.5
2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl(Sphos)]-palladacycles containing hydroxymethyl groups 2–3 were prepared by cyclopalladation and chloride bridge-splitting reactions. The complexes were characterized by elemental analysis, ESI–MS and NMR. In addition, single-crystal X-ray analysis reveals that they have one-dimensional lamellar structures involving intermolecular hydrogen bonds and π–π interactions
Base-assisted, copper-catalyzed N-arylation of (benz)imidazoles and amines with diarylborinic acids
作者:Changwei Guan、Yuanyuan Feng、Gang Zou、Jie Tang
DOI:10.1016/j.tet.2017.10.043
日期:2017.12
cost-effective aryl source has been efficiently effected via Cu(OAc)2-catalyzed Chan-Lam coupling in assistance of tetramethylethylenediamine (TMEDA) in methanol and pyridine (Py) in dichloromethane, respectively, in air at room temperature. The diarylborinic acids could be well accommodated by the Chan-Lam coupling oxidative conditions containing a proper combination of bases and solvents. The steric
the low reactivity of the Ar–NO2 bond toward oxidative addition. We report here the C–N coupling of nitroarenes and amines using palladium/5-(2,4,6-triisopropylphenyl)imidazolylidene[1,5-a]pyridines as the catalyst. The ligands are readily available from commercial chemicals. The reaction shows broad substrate scope and functionalgroup tolerance. The method is applicable to both aromatic and aliphatic