nosyl residue. Deprotection of these compounds afforded the propyl glycosides as well as oligomers with amino terminated aglyconic tethers. The tethers were generated from the oligosaccharide allyl glycosides by photoaddition with 2-aminoethanethiol. The functionalized haptens were coupled to BSA via squarate conjugation, and the degree of incorporation was established by TOF mass spectrometry.
为了研究白色念珠菌细胞壁
甘露聚糖的独特免疫学特性,已经合成了(1-> 2)-β-D-甘露
吡喃糖基残基的同源低聚物。对
氯苄基保护的磺酰
溴(2)与空间受阻的参与溶剂新戊酰腈相结合,为合成这些独特的均聚物(从二糖到六糖)提供了一种新方法。糖基供体2在糖基化和随后的还原步骤上均表现出高的非对映选择性,并使合成所需的保护基操纵次数最小化。合成了(1-> 2)-β-
D-甘露糖单糖的同源物,其中含有一个末端S-连接的(1-> 2)-β-D-
甘露聚糖基。这些化合物的脱保护得到丙基糖苷以及具有
氨基封端的糖苷酸系链的低聚物。通过与2-
氨基
乙硫醇光加成,由
寡糖烯丙基糖苷产生系链。通过方格偶联将功能化的半抗原与
BSA偶联,并通过TOF质谱确定结合度。