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    • 23. 发明授权
    • Method of preparing form II crystals of clarithromycin
    • 制备克拉霉素II型晶体的方法
    • US06515116B2
    • 2003-02-04
    • US09805831
    • 2001-03-14
    • Kwee-Hyun SuhSang-Min YunMi-Ra SeongGi-Jeong KimGwan-Sun LeeNam-Du Kim
    • Kwee-Hyun SuhSang-Min YunMi-Ra SeongGi-Jeong KimGwan-Sun LeeNam-Du Kim
    • C07H1708
    • C07H17/08Y02P20/55
    • High purity Form II crystals of clarithromycin can be easily prepared in a high yield by a process comprising the steps of: protecting the 9-oxime hydroxy group of erythromycin A 9-oxime or a salt thereof with a tropyl group and the 2′- and 4″-hydroxy groups with trimethylsilyl groups; reacting 2′,4″-O-bis(trimethylsilyl)erythromycin A 9-O-tropyloxime with a methylating agent; removing the protecting groups and the oxime group of 2′,4″-O-bis(trimethylsilyl)-6-O-methylerythromycin A 9-O-tropyloxime to obtain crude clarithromycin; treating the crude clarithromycin with methanesulfonic acid in a mixture of a water-miscible organic solvent and water to obtain crystalline clarithromycin mesylate trihydrate; and neutralizing the crystalline clarithromycin mesylate trihydrate with aqueous ammonia in a mixture of a water-miscible organic solvent and water.
    • 克拉霉素的高纯度II型晶体可以通过包括以下步骤的方法以高产率容易地制备:保护红霉素A 9-肟的9-肟羟基或其盐与丙基和2'-和 4“ - 羟基与三甲基甲硅烷基; 使2',4“ - O-双(三甲基甲硅烷基)红霉素A 9-O-草丙基肟与甲基化试剂反应; 除去2',4“-O-双(三甲基甲硅烷基)-6-O-甲基红霉素A 9-O-草丙基肟的保护基和肟基,得到粗克拉霉素; 在水混溶性有机溶剂和水的混合物中用甲磺酸处理粗克拉霉素,得到结晶克拉硫霉素甲磺酸盐三水合物; 并用水混溶性有机溶剂和水的混合物用氨水中和结晶克拉硫酸甲磺酸盐三水合物。