Synthesis of β-Cyclodextrin, Per-<b><i>O</i></b>-glycosylated through an Ethylene Glycol Spacer Arm
作者:Antonio Vargas-Berenguel、Francisco Santoyo-González、Africa García-Barrientos、Juan García-López、Joaquín Isac-García、Fernando Ortega-Caballero、Clara Uriel
DOI:10.1055/s-2001-14574
日期:——
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。