26-07-2018 дата публикации
Номер: US20180207195A1
An oxidized α-1,4-oligoglucuronic acid, and a preparation method therefor and uses thereof. By using abundant starch, especially soluble starch, in the natural world as the raw material, all 6-site hydroxyl groups of the starch α-1,4-polyglucose are oxidized into carboxyl groups to form glucuronic acid under the action of a sodium bromide (NaBr)-2,2,6,6-tetramethyl piperidine oxide (TEMPO)-sodium hypochlorite (NaClO) oxidation system, and the oxidized oligoglucuronic acid having an open ring at an end is prepared by controlling reaction conditions. The compound has obvious anti-cerebral ischemia activity, and can be developed into a potential anti-cerebral ischemia drug. 2. The oxidized α-1 claim 1 ,4-oligoglucuronic acid of claim 1 , wherein m=0.3. The oxidized α-1 claim 1 ,4-oligoglucuronic acid of claim 1 , wherein m=1.4. The oxidized α-1 claim 1 ,4-oligoglucuronic acid of claim 1 , wherein m=2.5. The oxidized α-1 claim 1 ,4-oligoglucuronic acid of claim 1 , wherein n=1-19.6. The oxidized α-1 claim 1 ,4-oligoglucuronic acid of claim 1 , wherein n=1-9.7. The oxidized α-1 claim 1 ,4-oligoglucuronic acid of claim 1 , wherein n is 1 claim 1 , 2 claim 1 , 3 claim 1 , 4 claim 1 , 5 claim 1 , 6 claim 1 , 7 claim 1 , 8 claim 1 , or 9 claim 1 , each corresponding to disaccharide claim 1 , trisaccharide claim 1 , tetrasaccharide claim 1 , pentasaccharide claim 1 , hexasaccharide claim 1 , heptasaccharide claim 1 , oct-saccharide claim 1 , nonus-saccharide or decasaccharide of the oxidized α-1 claim 1 ,4-oligoglucuronic acid.9. The mixture of claim 8 , wherein n′ is selected from 1.0 to 10.0 and m′ is selected from 0.5 to 1.8.10. The mixture of claim 8 , wherein the components with n of 1-9 account for more than 80% by weight of the mixture.11. A preparation process for oxidized α-1 claim 1 ,4-oligoglucuronic acid of claim 1 , comprising following steps:(1) weighing soluble starch and preparing it into aqueous solution;(2) sequentially adding 2,2,6,6-tetramethylpiperidine ...
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