Process for selectively deacetylating acetyl derivatives of saccharides
申请人:Daicel Chemical Industries, Ltd.
公开号:US04764605A1
公开(公告)日:1988-08-16
A process for selectively deacetylating an acetyl derivative of a saccharide is described, comprising treating an acetyl derivative of a monosaccharide or oligosaccharide using a mixture of an aqueous solution of alkali metal hydroxide/aqueous hydrogen peroxide/organic solvent to selectively hydrolyze acetate bonds at specific positions in the molecule, and thereby obtain a partially hydrolyzed acetyl derivative of a saccharide.
A cerebral metabolism activator containing at least one glucose ester derivative represented by general formula (I) as the active ingredient (wherein the anomeric substituent may be α or β; and R to R₄ represent each hydrogen, C₂-C₈ linear or branched acyl, or cyclic acyl, provided at least one of R to R₄ represents acyl), useful for treating shock cerebral function disorder caused by hypoglycemia, cerebral function disorder caused by a reduced power of active transport of glucose of the cerebrovascular barrier, and particularly cerebral function disorder accompanied by senile dementia or senile motor function disorder.
一种脑代谢激活剂,含有至少一种通式(I)代表的葡萄糖酯衍生物作为活性成分(其中异构取代基可以是 α 或 β;和 R 至 R₄ 分别代表氢、C₂-C₈ 直链或支链酰基或环状酰基,条件是 R 至 R₄ 中至少有一个代表酰基),可用于治疗由低血糖引起的休克性脑功能障碍、由脑血管屏障葡萄糖主动转运能力下降引起的脑功能障碍,特别是伴有老年性痴呆或老年性运动功能障碍的脑功能障碍。
THE ACTION OF PERBENZOIC ACID ON GLUCAL AND ITS DERIVATIVES