An alternative reaction pathway towards the preparation of an L-idopyranose derivative and its application to the synthesis of the α-L-iduronidase fluorogenic substrate 4-methylcoumarin-7-ylα-L-iduronic acid as well as its 3-undecyl derivative are described. The L-ido sugar was prepared by converting the commercially available diacetone-α-D-glucose to methyl 1,2,3,4-tetra-Oacetyl-L-idopyranuronate
描述了制备 l-idopyranose 衍
生物的替代反应途径及其在合成 α-l-iduronidase 荧光底物 4-methylcoumarin-7-ylα-l-iduronic acid 及其 3-undecyl 衍
生物中的应用. L-ido 糖的制备方法是将市售的双
丙酮-α-
D-葡萄糖通过关键中间体 1 的氧化、酯化和区域选择性乙酰化转化为 1,2,3,4-四-O乙酰基-L-
碘代
吡喃糖醛酸甲酯, 2:3,5-二-O-异亚丙基-β-L-异
呋喃糖。在 L-ido 供体与 4-甲基
香豆素受体的偶联中采用了 Mitsunobu 型糖基化。这种新开发的路线减少了以前在合成 α-Liduronidase 荧光底物时遇到的困难。