A Variable Concept for the Preparation of Branched Glycosyl Phosphatidyl Inositol Anchors
作者:Klaus Pekari、Richard R. Schmidt
DOI:10.1021/jo026380j
日期:2003.2.1
A variable concept for the synthesis of branched glycosyl phosphatidyl inositol (GPI) anchors was established. Its efficiency could be shown by the successful synthesis of the GPI anchor of rat brain Thy-1 and of the scrapie prion protein both in the water soluble 1c and lipidated form 1a. Retrosynthesis led to building blocks 2-6 of which 5 could be further disconnected to building blocks 7-9. Trichloroacetimidate
建立了用于合成支链糖基磷脂酰肌醇(GPI)锚的可变概念。它的效率可以通过成功合成大鼠脑Thy-1的GPI锚和水溶性1c和脂化形式1a的刮the病毒蛋白来证明。逆向合成导致结构单元2-6,其中5可以进一步断开与结构单元7-9的连接。使用已知的糖基供体7和8从糖基受体9开始以直接的方式构建三氯乙酰亚胺酸5。然后通过将伪二糖受体6与供体5进行糖基化组装碳水化合物骨架。为确保糖基化反应中的高立体选择性和高收率,使用了辅助的辅助疗法。连续脱保护并引入各种磷酸盐残基,得到了完全保护的GPI锚。Boc保护基的催化氢化和酸催化裂解提供了目标分子,可以在结构上进行完全分配。