with copper(I) chloride was employed for the first time in Sonogashira cross-coupling reactions of phenylacetylene with various aryl halides. The goal was to use an efficient green media by using copper instead of palladium in metal-catalyzed coupling reactions. Monobenzyl nicotinium chloride, a quaternary ammonium salt containing a coordinating centre, plays an important role in this catalytic system
under mol ppm catalytic conditions. Reaction-rate analysis, transmission electron microscopic (TEM) examination of the reaction mixture, and mercury-amalgamation test were performed to gain insight into the activespecies of the highlyactive ppm catalyticspecies. TEM examination of the reaction mixture revealed that palladium nanoparticles were generated in situ under the reaction conditions, and
Microwave-assisted Sonogashira cross-coupling reaction catalyzed by CN-ortho-palladated complex of tribenzylamine under copper-free conditions
作者:Abdol R. Hajipour、Fatemeh Rafiee
DOI:10.1007/s13738-014-0577-5
日期:2015.7
[PdC6H4(CH2N(CH2Ph)2)} (µ-Br)]2 complex as an efficient, stable and non-sensitive to air and moisture catalyst was investigated in the Sonogashiracross-couplingreaction under microwave irradiation. In the presence of catalytic amount of this homogeneous catalytic system, various aryl halides were efficiently coupled with phenylacetylene under copper-free conditions. The substituted internal alkynes
在Sonogashira中研究了[Pd C 6 H 4(CH 2 N(CH 2 Ph)2)}(µ-Br)] 2络合物作为一种高效,稳定且对空气和湿气不敏感的催化剂的催化活性。微波辐射下的交叉偶联反应。在催化量的这种均相催化体系存在下,各种芳基卤化物在无铜条件下有效地与苯乙炔偶联。在100°C下,在NMP中以较短的反应时间以优异的收率生产了取代的内部炔烃。二聚配合物作为均相催化剂和微波辐射以及NMP作为微波活性极性溶剂的组合在较短的反应时间内获得了更高的收率。
The Use of a Bifunctional Copper Catalyst in the Cross-Coupling Reactions of Aryl and Heteroaryl Halides with Terminal Alkynes
(BeDABCO)<sub>2</sub>Pd<sub>2</sub>Cl<sub>6</sub>as an efficient homogeneous catalyst for copper-free Sonogashira cross-coupling reaction
作者:Abdol R. Hajipour、Fatemeh Rafiee
DOI:10.1002/aoc.3167
日期:2014.8
1‐benzyl‐4‐aza‐1‐azoniabicyclo[2.2.2]octanechloride and palladiumchloride ((BeDABCO)2Pd2Cl6) was developed for the Sonogashira reaction. In the presence of a catalytic amount of this efficient, stable homogeneous catalytic system that is non‐sensitive to air and moisture, various aryl halides were efficiently coupled with phenylacetylene in good yields in H2O at 50°C under copper‐free conditions. Benzyl