residues are described. Syntheses were based on an oxidation-reduction strategy to construct the O-linked beta-mannopyranoside bonds and a SN2 inversion to provide 1-thio-beta-mannopyranoside residues. Subsequently the allyl trisaccharide glycosides were subjected to photo addition with cysteine amine and coupled to tetanus toxoid and bovine serum albumin with good efficiency via an adipic acid tether
用
硫原子取代糖苷氧原子是一种有前途的技术,用于产生对内源糖苷酶
水解的抵抗力增强的糖缀合物。描述了两个不同的(1-> 2)-β-
甘露聚糖三糖的内部残基-S-连接的甘露
吡喃糖残基的合成和抗原特性。合成基于氧化还原策略来构建O-连接的β-
甘露糖吡喃糖苷键和SN2反转以提供1-
硫代-β-
甘露糖吡喃糖苷残基。随后,用半胱
氨酸胺对烯丙基三糖苷进行光加成,并通过
己二酸系链以良好的效率将其与破伤风类毒素和
牛血清白蛋白偶联。