Syntheses of model oligosaccharides of biological significance. 4. Synthesis of a fucosylated <i>N</i>,<i>N</i>′-diacetylchitobioside and related oligosaccharides
作者:David A. Schwartz、Ho-Huat Lee、Jeremy P. Carver、Jiri J. Krepinsky
DOI:10.1139/v85-182
日期:1985.5.1
The synthesis of two trisaccharides and one disaccharide containing L-fucose and 2-acetamido-2-deoxy-D-glucose is reported. Methyl 3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranoside was glycosylated with a 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl bromide. Removal of the phthalimido protecting groups by hydrazinolysis followed by N-acetylation and debenzylation yielded methyl
合成了两种三糖和一种含有 L-岩藻糖和 2-乙酰氨基-2-脱氧-D-葡萄糖的二糖。甲基 3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranoside 用 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β- 糖基化D-吡喃葡萄糖基溴。通过肼解作用去除邻苯二甲酰亚胺保护基团,然后进行 N-乙酰化和脱苄基作用,得到 N,N'-二乙酰壳二糖苷 3',4',6'-三乙酸甲酯。后者在 6 位用 2,3,4-三-O-苄基-α-L-吡喃岩藻糖基溴选择性岩藻糖基化,在脱苄基和脱-O-乙酰化后,得到甲基2-乙酰氨基-4-O- (2-acetamido-2-deoxy-β-D-glucopyranosyl)-2-deoxy-6-O-(α-L-fucopyranosyl)-β-D-glucopyranoside。当甲基 3-