Protecting-Group-Free One-Pot Synthesis of Glycoconjugates Directly from Reducing Sugars
作者:David Lim、Margaret A. Brimble、Renata Kowalczyk、Andrew J. A. Watson、Antony John Fairbanks
DOI:10.1002/anie.201406694
日期:2014.10.27
The conversion of sugars into glycomimetics typically involves multiple protecting‐group manipulations. The development of methodology allowing the direct aqueous conversion of free sugars into glycosides, and mimics of oligosaccharides and glycoconjugates in a high‐yielding and stereoselective process is highly desirable. The combined use of 2‐azido‐1,3‐dimethylimidazolinium hexafluorophosphate and
糖类转化为拟糖模拟物通常涉及多个保护基团操纵。迫切需要开发一种方法,以将高糖和立体选择性过程中的游离糖直接水转化为糖苷,并模拟寡糖和糖缀合物。六氟磷酸2-叠氮基-1,3-二甲基咪唑啉鎓与Cu催化的Huisgen环加成反应的结合使用,可以直接在含水条件下通过还原糖在一步反应中合成一系列糖结合物。该反应是完全立体选择性的,可用于三唑连接的糖苷,寡糖和糖肽的融合合成。该程序为寡糖和带有炔烃侧链的肽的单锅水溶液连接提供了一种方法。