sialylation was accomplished using donor 10 with defined configuration established through X-ray crystallographic analysis. Target oligosaccharides 1-3 were then obtained by the systematic deprotection of intermediates 24, 27 and 29. With these target oligosaccharides 1-3 obtained, biological evaluations of these molecules as enzyme substrates was undertaken and selectin binding studies are planned
开发了合成核心2寡
糖类似物1和2,以及天然形式的
唾液酸化和
硫酸化六糖3的收敛途径。五糖24、27和六糖28的构建分别通过受体5、7和8中6-OH的完全区域选择性糖基化来实现,这是由于这些中伯羟基的活性远高于仲轴向羟基。结构。使用通过X射线晶体学分析建立的确定构型的供体10完成立体选择性
唾液酸化。然后通过中间体24、27和29的系统脱保护获得目标
寡糖1-3。用这些目标
寡糖1-3,