Synthesis of heteropolynuclear Cu-I and Pd-II complexes with polymeric 2,2 '-biquinoline-containing ligands and investigation of their catalytic activity in the Sonogashira couplingsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:A method for electrosynthesis of heteropolynuclear biquinoline-containing Cu-I and Pd-II complexes using sacrificial Cu and Pd anodes was developed. The sequence of anode dissolution ( first Pd and then Cu) was important for the synthesis of the complex. The opposite sequence of dissolution resulted in oxidation of the initially formed CuI ions to Cu-II. The obtained CuI and PdII complexes with polymer ligands had high catalytic activity in the reaction of aryl halides with phenylacetylene giving rise to a C(sp(2))-C(sp) bond. The yield of arylphenylacetylene in the presence of 0.1 mol.% of Pd catalyst in relation to the starting halide was 50-90% depending on the nature of the aryl halide.