The synthesis of phosphorylated disaccharide components of the extracellular phosphomannan of Pichia (Hansenula) holstii NRRL Y-2448
作者:Jon K. Fairweather、Tomislav Karoli、Vito Ferro
DOI:10.1016/j.bmc.2004.09.005
日期:2004.12
Methods for the stereoselective synthesis of alpha-(1-->2)- and alpha-(1-->3)-linked 6(II)-O-phosphomannobiosides were developed. Two strategies were successfully employed: a D-mannosyl acceptor was coupled with a phosphorylated D-mannosyl trichloroacetimidate donor, or alternatively with a differentially 6-O-protected D-mannosyl trichloroacetimidate donor which, after glycosylation, was selectively
开发了立体选择性合成α-(1-> 2)-和α-(1-> 3)连接的6(II)-O-磷酸甘露糖苷的方法。成功地采用了两种策略:将D-甘露糖基受体与磷酸化的D-甘露糖基三氯乙酰亚氨酸酯供体偶联,或者与差异化的6-O-保护的D-甘露糖基三氯乙酰亚氨酸酯供体偶联,其在糖基化之后被选择性地脱保护并磷酸化。打算用于抗血管生成药物候选物PI-88、2-O-(6-O-磷酸-α-D-甘露吡喃糖基)-D-甘露吡喃糖和甲基3-O-(6-O-合成了磷酸-α-D-甘露吡喃糖基)-α-D-甘露吡喃糖苷。前者是毕赤酵母NRRL Y-2448胞外磷酸甘露聚糖侧链重复单元的次要成分,