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چکیده
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Phosphorus ylides are a member of very interesting ligands in organometallic chemistry[1]and metallic complexes of these compounds are also useful in organic synthesis and have been used as precursor in catalytic reactions[2].Recently, the use of copper complexes in the cross-coupling reactions has been studied [3].The origin of Suzuki coupling procedures involves the use of palladium phosphine complexes as catalysts, but due to the economy aspects, the use of cheaper metalssuch as copper complexes as well as palladium homologous combined with a ligand (phosphorous ylide) isan alternativechoice for this coupling reaction.Herein, we report the synthesis, characterization and application of new Cu(I) complex [Cu(μ-Cl){Ph2P(CH2)2PPh2C(H)C(O)Ph-m-Br}]2towardthe Suzuki cross-coupling reaction.Reaction of α-keto stabilizedphosphorous ylides Ph2P(CH2)2PPh2C(H)C(O)Ph-m-Br with CuClin 1:1 ratios leads to binuclear products of the type {CuCl(ylide)}2.Characterization of the complex by IR,1H, 31P and 13C NMR spectroscopy confirmed coordination of the ylide to the metal through the carbon atom (Fig. 1).The complex was found to exhibit good catalytic activity in the Cu-catalyzed Suzuki cross-coupling reactions inan air atmosphere at medium catalyst loading in NMP as a solvent forcoupling of various aryl halides withphenyl boronic acid.
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