Structure of aldose condensation products with 2-hydroxyand 2-sulfanylbenzohydrazides
作者:V. V. Alekseev、A. Yu. Ershov、B. V. Chernitsa、V. A. Doroshenko、I. V. Lagoda、S. I. Yakimovich、I. V. Zerova、V. V. Pakal’nis、V. V. Shamanin
DOI:10.1134/s1070428010060138
日期:2010.6
structure of the condensation products of 2-hydroxy- and 2-sulfanylbenzohydrazides with a series of aldoses (L-arabinose, D-ribose, L-ramnose, D-galactose, D-glucose, D-mannose) was studied by 1H and 13C NMR spectroscopy. The condensation products of monosaccharides with 2-hydroxybenzohydrazide in DMSO-d 6 solution exist as equilibrium mixtures of linear hydrazone and cyclic pyranose and furanose forms, the
1 H研究了2-羟基和2-硫烷基苯甲酰肼与一系列醛糖(L-阿拉伯糖,D-核糖,L-ramnose,D-半乳糖,D-葡萄糖,D-甘露糖)的缩合产物的结构。和13 C NMR光谱。单糖与2-羟基苯甲酰肼在DMSO- d 6溶液中的缩合产物以线性与环状吡喃糖和呋喃糖形式的平衡混合物形式存在,环状互变异构体由两个立体异构体(α-和β-端基异构体)代表。与2-硫烷基苯并肼结晶的醛糖缩合产物具有环状1,3,4-苯并噻二氮杂二环结构,而在DMSO- d 6中 溶液中它们经历完全或部分异构化成环状吡喃糖互变异构体。