Electroorganic Synthesis 66: Selective Anodic Oxidation of Carbohydrates Mediated by TEMPO
作者:Karsten Schnatbaum、Hans J. Schäfer
DOI:10.1055/s-1999-3464
日期:1999.5
The carbohydrates 4-15 are anodically oxidized with 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) as mediator. Selective and complete reaction at the primary hydroxyl groups affords the corresponding carboxylic acid 16-32 in moderate to excellent yield. Methyl α-d-glucopyranoside is converted in 98% yield to the uronic acid 16. Cyclic voltammetry shows that the oxydation is base-catalyzed and the oxidation of the hydroxy group with TEMPO+ (2) is rate determining.
碳水化合物4-15在2,2,6,6-四甲基哌啶-1-氧自由基(TEMPO)的介导下进行阳极氧化。对初级羟基的选择性和完全反应在中等到优良的产率下生成相应的羧酸16-32。甲基α-d-葡萄糖苷以98%的产率转化为尿酸16。循环伏安法显示氧化是碱催化的,TEMPO+(2)对羟基的氧化是速率控制步骤。