Rapid assembly of phosphate-bridged tetra-mannose by ionic liquid-supported oligosaccharide synthesis
作者:Guangyi Yang、Guodong Mei、Peng Shen、Haofei Hong、Zhimeng Wu
DOI:10.1016/j.carres.2020.108209
日期:2021.2
An efficient ionic liquid-supported oligosaccharide synthesis (ILSOS) strategy was described for the synthesis of linear oligo-phosphomannan. A new cleavable benzyl carbamate-type IL supporter containing 5-aminopentanyl linker was designed as an acceptor IL tag to facilitate this synthesis. The chain elongation on IL tag was achieved by H-phosphonate chemistry, including condensation with α-mannosyl
描述了一种有效的离子液体支持的寡糖合成 (ILSOS) 策略,用于合成线性寡聚-磷酸甘露聚糖。含有 5-氨基戊基接头的新型可裂解氨基甲酸苄酯型 IL 支持物被设计为受体 IL 标签以促进该合成。IL 标签上的链延长是通过 H-膦酸酯化学实现的,包括与 α-甘露糖基 H-膦酸酯缩合、原位氧化反应和随后的脱保护。四个循环后,45小时内得到线性α-(1→6)-四甘露聚糖磷酸酯,总产率为52.7%。IL 标记的产品在极性和非极性溶剂系统中表现出可调的溶解度,这有助于组装过程中的无色谱纯化。在最后一步氢解处理后,IL标签可以很容易地去除,在磷酸聚糖的还原端提供一个胺封端的接头,用于进一步与载体蛋白结合。该方法为合成磷酸聚糖提供了一种高效且无需色谱的方法。