申请人:Centre national de la recherche scientifique
公开号:US10640526B2
公开(公告)日:2020-05-05
Disclosed is a method of preparation of 6-azido-2,4-diacetamido-2,4,6-trideoxy-D-mannose. This method includes the chemical reaction of compound of formula X:
Wherein: R1 can be a C1 to C6 alkyl including methyl, ethyl, isopropyl; aryl including phenyl; each of these groups being substituted or not; and R2 can be a C1 to C6 alkyl including methyl, ethyl, isopropyl, tert-butyl, isobutyl; each of these groups being substituted or not; with a deprotecting reagent including a Lewis or Brönsted acid in a polar aprotic solvent, thereby obtaining a free C-1 OH group. The method can also start with the preparation from commercially available D-galactose pentaacetate, D-galactose tetraacetate or tetraacetyl D-galactosyl trichloroacetimidate. The step of deprotecting the anomeric position avoids the use of cerium and allows the easy purification of 6-azido-2,4-diacetamido-2,4,6-trideoxy-D-mannose.
本发明公开了一种制备 6-叠氮-2,4-二乙酰氨基-2,4,6-三脱氧-D-甘露糖的方法。该方法包括式 X 化合物的化学反应:
其中R1 可以是包括甲基、乙基、异丙基在内的 C1 至 C6 烷基;包括苯基在内的芳基;这些基团中的每个基团是否被取代;以及 R2 可以是包括甲基、乙基、异丙基、叔丁基、异丁基在内的 C1 至 C6 烷基;这些基团中的每个基团是否被取代。该方法也可以从市售的 D-半乳糖五乙酸酯、D-半乳糖四乙酸酯或 D-半乳糖基三氯乙酸亚氨酸四乙酸酯开始制备。去保护异构体位置的步骤避免了铈的使用,并使 6-叠氮-2,4-二乙酰氨基-2,4,6-三脱氧-D-甘露糖易于纯化。