For the preparation of l-iduronic acid, trehalose was converted into a derivative of a novel disaccharide, β-l-idopyranosyl β-l-idopyranoside, through diastereoselective hydroboration of the 5, 5′-di-eno intermediate. The 6- and 6′-hydroxy groups were then oxidized in two steps to give a disaccharide composed of 2 units of l-iduronate moieties, which underwent acidic cleavage of the glycosidic bond
为了制备I-艾杜糖醛酸,通过对5,5'-di-eno中间体进行非对映选择性氢
硼化,将
海藻糖转化为新型二糖的衍
生物,即β-1-1-idopyranosylβ-1-l-idopyranoside。然后在两个步骤中将6-和6'-羟基氧化,得到由2个单元的l-
艾杜糖酸酯部分组成的二糖,将其糖苷键进行酸性裂解,得到目标化合物。