The synthesis of cyclodextrin-based O-α-manno, O-β-galactopyranoside and O-β-galactofuranoside clusters, having seven sugar residues attached to the core, through ethylene, ethylenoxyethylene and ethylene-(dioxyethylene)-ethylene spacer arms is described. The synthesis involves the glycosylation of the oxyethylene arm and the attachment of the O-glycosides onto the heptakis(6-deoxy-6-iodo)-β-cyclodextrin derivative by means of nucleophilic displacement reaction using cesium carbonate in dimethylformamide.
本研究描述了基于
环糊精的 O-δ-
甘露糖苷、O-δ-半
乳糖苷和 O-δ-半
乳糖呋喃糖苷簇的合成,这些簇的核心通过
乙烯、
乙烯氧基
乙烯和
乙烯-(二氧
乙烯)-
乙烯间隔臂连接了七个糖残基。合成过程包括在二甲基甲酰胺中使用
碳酸铯进行亲核置换反应,对氧
乙烯臂进行糖基化,并将 O-糖苷连接到庚基(6-脱氧-6-
碘)-δ-
环糊精衍
生物上。