Linking carbohydrates to proteins using N-(2,2-dimethoxyethyl)-6-hydroxy hexanamide
作者:Jian Zhang、Alfred Yergey、Jeffrey Kowalak、Pavol Kováč
DOI:10.1016/s0040-4020(98)83039-1
日期:1998.9
The title dimethyl acetal 4 and related compounds can be efficiently synthesized by treatment of 6-caprolactone with commercially available dialkyl acetals. Conventional glucosylation using 4 as a glycosyl acceptor gave mainly β-glycosides which were deprotected to give 13. The latter was converted to the corresponding aldehyde 16, which was used as a hapten in conjugation, by reductive amination,
通过用市售的二烷基乙缩醛处理6-己内酯,可以有效地合成标题二甲基乙缩醛4和相关化合物。使用4作为糖基受体的常规糖基化作用主要产生的β-糖苷被脱保护得到13。后者转化为相应的醛16,通过还原胺化将其用作半抗原与鸡血清白蛋白(CSA)结合。使用MALDI-TOF光谱研究了半抗原掺入后反应时间,半抗原16的浓度和摩尔比对CSA中L-赖氨酸残基数量的影响。半抗原的高CSA负载量,高达22摩尔(16摩尔)/ CSA,可以使半抗原的利用率达到32%。还制备了类似于16的霍乱弧菌O -PS ,血清型小川和CSA的O-PS的单糖决定簇的衍生物的糖缀合物。根据对D-葡萄糖衍生物的研究,霍乱弧菌半抗原的掺入与预期值有显着一致性。