作者:Gour Chand Daskhan、Narayanaswamy Jayaraman
DOI:10.1016/j.carres.2011.08.030
日期:2011.11
disaccharide analogues, containing an additional methylene group in between the glycosidic linkage, were synthesized by utilizing 4-C-hydroxymethyl-alpha-d-glucopyranoside as the glycosyl donor. A kinetic study was undertaken to assess the hydrolytic stabilities of these new disaccharide analogues toward acid-catalyzed hydrolysis, at 60 degrees C and 70 degrees C. The studies showed that the disaccharide
利用4-C-羟甲基-α-d-吡喃葡萄糖苷作为糖基供体,合成了三个新的羟甲基连接的非天然二糖类似物,在糖苷键之间包含一个额外的亚甲基。进行了动力学研究,以评估这些新的二糖类似物在60摄氏度和70摄氏度下对酸催化水解的水解稳定性。研究表明,二糖类似物比天然存在的稳定了一个数量级。二糖,例如纤维二糖,乳糖和麦芽糖。一级速率常数低于甲基苷,并且水解速率常数的趋势遵循天然存在的二糖的趋势。α-异头物显示出比β-异头物更快的水解,并且轴向羟基的存在也导致二糖类似物中的更快的水解。通过分子建模得出的能量最小化结构表明,二糖类似物中糖苷键周围的二面角几乎与天然存在的二糖相似。