Kinetics and mechanism of oxidation of erythro-series pentoses and hexoses by N-chloro-p-toluenesulfonamide
作者:Kanchugarakoppal S Rangappa、Manikanahally P Raghavendra、Dandinasivara S Mahadevappa、D Channe Gowda
DOI:10.1016/s0008-6215(97)00243-7
日期:1998.1
complex. The reaction rate was almost doubled in deuterium oxide. Activation energies were calculated from the Arrhenius plots. HPLC and GLC-MS analyses of the products indicated that the sugars were oxidized to a mixture of aldonic acids, consisting of arabinonic, ribonic, erythronic, and glyceric acids. Based on these data, a plausible mechanism involving the aldo-enolic anions of pentoses and keto-enolic
研究了在碱性介质中用氯胺-T氧化D-葡萄糖,D-甘露糖,D-果糖,D-阿拉伯糖和D-核糖的动力学及其机理。观察到速率定律,速率= k [氯胺-T] [糖] [HO-] 2。反应速率受介质离子强度变化的影响,并且发现介电效应为负。后者使得能够计算dAB,即激活复合物的大小。在氧化氘中,反应速率几乎翻倍。活化能从阿累尼乌斯曲线计算得出。产物的HPLC和GLC-MS分析表明,糖被氧化成醛糖酸的混合物,该醛糖酸由阿拉伯酸,核糖酸,赤藓酸和甘油酸组成。根据这些数据,