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Catalytic activity of palladium(II) complexes with N-arylalkyliminodiacetic acids in alkoxycarbonylation of iodobenzene

The reactions of N-arylalkyl derivatives of iminodiacetic acid (H2Bnida, H2Peida, H2Ppida, o-H2Cbida ; Bn = benzyl, Pe = 2-phenylethyl ; Pp = 3-phenylprop-1-yl ; o-Cb = o-chlorobenzyl) with sodium tetrachloropalladate(II) in aqueous solutions were investigated. Five new palladium(II) complexes [Pd(HBnida)2] ∙ 2H2O (1a), [Pd(HBnida)2] (1b), [Pd(HPeida)2] (2), [Pd(HPpida)2] (3) and [Pd(o-HCbida)2] (4) were prepared and characterized by infrared spectroscopy, 1H, 13C and 15N NMR spectroscopy and thermal analysis (TGA/DTA). The crystal structure of 1a was determined by single-crystal X-ray structural analysis. The palladium(II) ion in the molecule of 1a adopts a square planar coordination with two N, O-bidentate N-benzyl-hydrogeniminodiacetate ions. Complex 1a is a trans-isomer. All prepared palladium(II) complexes exhibit the acceptable activities towards the methoxycarbonylation of iodobenzene.

palladium(II) complexes; catalysis; alkoxycarbonylation; iodobenzene

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