Oxidative dehydrogenation of N-(2-hydroxy-3,5-R1,R2-benzyl)-4-aminoantipyrines in the complexation reaction
作者:A. A. Medzhidov、P. A. Fatullaeva、S. M. Peng、R. G. Ismaiylov、G. H. Lee、S. R. Garaeva
DOI:10.1134/s1070328412010071
日期:2012.2
Reactions of N-(2-hydroxy-3,5-R1,R2-benzyl)-4-aminoantipyrines with copper acetate in ethanol gave complexes with Schiff bases (SBs) rather than the expected complexes with reduced SBs; i.e., the starting ligands undergo oxidative dehydrogenation during the complexation reaction. The corresponding complexes with reduced SBs were obtained from sodium salts of the ligands and cupric sulfate in aqueous
N-(2-羟基-3,5-R 1,R 2-苄基)-4-氨基安替比林与乙酸铜在乙醇中的反应得到了具有席夫碱(SBs)的配合物,而不是预期的具有降低的SBs的配合物。即,起始配体在络合反应期间经历氧化脱氢。从配体的钠盐和硫酸铜在水溶液中获得相应的具有还原的SB的复合物。动力学测量表明,杂合配合物Cu(L i)(CH 3 COO)(X)(L i H是N-(2-羟基-3,5-R 1,R 2-苄基的衍生物) -4-氨基安替比林; i = 6-10; X = H 2O,CH 3 OH,CH 3 CH 2 OH),但在配合物CH 3 OH,CH 3 CH 2 OH中不发生。Cu(L i)2 ·H 2 O中配体的氧化脱氢的不存在可以通过Cu 2+离子的八面体环境以及分子氧的配位点的缺乏来解释。通过X射线衍射确定了两种具有SB的Cu(II)配合物的分子结构。