Disaccharides 1-3 corresponding to the antigenic determinants of Salmonella serotypes A, B, and D1were synthesized in a form suited for use in biosensors. The disaccharide determinants each contain a unique 3,6-dideoxyhexose, namely abequose (3,6-dideoxy-D-xylo-hexose), paratose (3,6-dideoxy-D-ribohexose), and tyvelose (3,6-dideoxy-D-arabino-hexose), are α-linked to the 3-position of D-mannopyranose. The disaccharides were further derivatized with a linear aglycon that has a terminal amino group, and can be readily coupled to pertinent chains carrying a terminal thiol for the construction of self-assembled monolayers (SAMs). Efficient routes that employed a single 3,6-dideoxygenation step were developed for the synthesis of paratoside 15 and tyveloside 22.Key words: Salmonella O-antigens, lipopolysaccharide, abequose, paratose, tyvelose, 3,6-dideoxyhexose, deoxygenation, glycoside tethers, immobilization via pentenyl glycosides.
1-3号二糖对应沙门氏菌血清型A、B和D的抗原决定因子,已经合成成适合在生物传感器中使用的形式。这些二糖决定因子每个都包含一种独特的3,6-二去氧己糖,即阿贝酮(3,6-二去氧-D-木糖己糖)、帕拉糖(3,6-二去氧-D-核糖己糖)和蒂维糖(3,6-二去氧-D-阿拉伯糖己糖),它们与D-甘露糖的3位α键合。这些二糖进一步与具有末端氨基基团的线性糖苷基团衍生物化,可以轻松地与携带末端硫醇的相关链耦合,用于构建自组装单分子膜(SAMs)。已开发了采用单一3,6-二去氧化步骤的高效合成帕拉糖苷15和蒂维糖苷22的路线。关键词:沙门氏菌O抗原、脂多糖、阿贝酮、帕拉糖、蒂维糖、3,6-二去氧己糖、去氧化、糖苷连接物、通过戊烯基糖苷固定。