Multigram syntheses of the disaccharide repeating units of chondroitin 4- and 6-sulfates
作者:Jean-Claude Jacquinet、Laurence Rochepeau-Jobron、Jean-Philippe Combal
DOI:10.1016/s0008-6215(98)00298-5
日期:1998.12
described. The disaccharide benzyl methyl 2,3,4-tri-O-benzoyl-beta-D-glucopyranosyluronate- (1-->3)-2-acetamido-2-deoxy-alpha-D-galactopyranoside was used as a common intermediate. Selective benzoylation at O-6 followed by O-sulfonation at C-4 of the aminosugar moiety, saponification and catalytic hydrogenation afforded the 4-O-sulfo derivative, whereas selective O-sulfonation at C-6 followed by similar
软骨素4-的二糖重复单元-β-D-吡喃葡萄糖基糖醛酸-(1-> 3)-2-乙酰氨基-2-脱氧-4-和6-O-磺基-D-吡喃半乳糖二钠盐的克图合成描述了2-硫酸盐和6-硫酸盐。将二糖苄基甲基2,3,4-三-O-苯甲酰基-β-D-吡喃葡萄糖基尿酸酯-(1-> 3)-2-乙酰氨基-2-脱氧-α-D-吡喃半乳糖苷用作常用中间体。在O-6处进行选择性苯甲酰化,然后在氨基糖部分的C-4处进行O-磺化,进行皂化和催化氢化,得到4-O-磺基衍生物,而在C-6处进行选择性O-磺化,然后进行类似的脱保护步骤,得到6 -O-磺基衍生物的收率高。