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    • 10. 发明申请
    • LOW MOLECULAR WEIGHT POLYSACCHARIDES HAVING ANTHROMBOTIC ACTIVITY
    • 低分子量多糖具有抗氧化活性
    • WO2005058976A2
    • 2005-06-30
    • PCT/IB2004/004128
    • 2004-12-15
    • GLYCORES 2000 S.R.L.ORESTE, Pasqua, AnnaZOPPETTI, Giorgio
    • ORESTE, Pasqua, AnnaZOPPETTI, Giorgio
    • C08B37/00
    • C08B37/0063
    • Novel depolymerized-LMWepiK5-N,O-sulfates obtainable starting from a LMW­ epiK5-N-sulfate prepared by nitrous depolymerization of an epiK5-N-sulfate or by C5-epimerization of a LMW-K5-N-sulfate obtained by nitrous depolymerization of a KS-N-sulfate. A process consists of submitting the starting depolymerized-LMW-epiK5-N-sulfate to four steps: a O-oversulfation, a partila 0-desulfation, a 6-0-sulfation and a N-sulfation. The new depolymerized­LMWepiK5-N,O-sulfates present a di- or trisulfated 2,5-anhydromannitol unit at the reducing end of the majority of its chains, have a content of iduronic acid of 40-60%, a sulfation degree of from 2.3 to 2.9 and a mean molecular weight of from about 1,500 to about 12,000. They exhibit a good antithrombotic activity with a low pro-hemorrhagic risk.
    • 新型解聚LMWepiK5-N,O-硫酸酯可从LMW&shy开始获得; 通过epiK5-N-硫酸盐的亚硝基解聚反应制备的epiK5-N-硫酸酯或通过KS-N-硫酸酯的亚硝基解聚反应获得的LMW-K5-N-硫酸酯的C5-差向异构化制备。 一种方法包括将起始解聚的LMW-epiK5-N-硫酸酯分成四个步骤:O-过硫酸盐,partila-脱硫酸盐,6-0-硫酸盐化和N-硫酸盐化。 新的解聚&害羞的; LMWepiK5-N,O-硫酸盐在其大部分链的还原端呈现二 - 或三硫酸化的2,5-脱水甘露糖醇单元,具有40-60%的艾杜糖醛酸含量,硫酸化度 从2.3到2.9,平均分子量从约1,500到约12,000。 它们表现出良好的抗血栓形成活性,具有低的出血前风险。