A novel convergent strategy for the construction of oligosaccharides using TIPS-protected glycosides. Synthesis of fragments related to glycolipids of Mycobacterium smegmatis
作者:Thomas Ziegler、Elisabeth Eckhardt
DOI:10.1016/s0040-4039(00)60999-1
日期:1992.10
4,6-O-Pyruvylated glucosides 1 were converted to the corresponding glucosyl fluorides 3 and 2,3-O-TIPS-protected glucopyranosides 5, respectively. Lewis-acid-catalyzed coupling of 3 and 5 afforded the pyruvylated disaccharides 6 one of which was further converted via the dissacharide donor 8 to di- and trisaccharide fragments of Mycobacterium smegmatis.
将4,6- O-丙酮酸化的葡糖苷1分别转化为相应的葡糖基氟化物3和2,3 - O -TIPS保护的葡糖吡喃糖苷5。3和5的路易斯酸催化的偶合提供了丙酮酸化的二糖6,其中之一通过二糖供体8被进一步转化为耻垢分枝杆菌的二糖和三糖片段。