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    • 4. 发明申请
    • A PROCESS FOR THE MANUFACTURE OF CEFPODOXIME PROXETIL
    • CEFPODOXIME PROXETIL的制造方法
    • WO2004060896A1
    • 2004-07-22
    • PCT/IN2003/000003
    • 2003-01-06
    • LUPIN LIMITEDGHARPURE, Milind, MoreshwarDESHMUKH, Sanjay, ShankarMAHALE, Rajendra, Dagesing
    • GHARPURE, Milind, MoreshwarDESHMUKH, Sanjay, ShankarMAHALE, Rajendra, Dagesing
    • C07D501/04
    • C07D501/60C07D501/04C07D501/12
    • A process for obtaining cefpodoxime proxetil of formula (I), of high purity conforming to pharmacopoeial specifications is disclosed. The process comprises addition of a solution of methanesulfonic acid in water to a solution of impure cefpodoxime proxetil of formula (I) in an organic solvent to form the corresponding cefpodoxime proxetil methanesulfonate of formula (II 1 ), followed by addition of a co-solvent and separation of the aqueous phase containing cefpodoxime proxetil methanesulfonate of formula (II 1 ) having a diastereomeric ratio of (R/R+S) between 0.5 to 0.6 and subsequent neutralization of the methaneulfonate salt (II 1 ) with a base to give cefpodoxime proxetil (I) free of impurities and having a diastereomeric ratio of (R/R+S) between 0.5 to 0.6, or, addition of impure cefpodoxime proxetil of formula (I) to a solution of methanesulfonic acid in water to form the corresponding solution of cefpodoxime proxetil methanesulfonate of formula (II 1 ) in water, followed by sequential addition of a first organic solvent and a co-solvent and separation of the aqueous phase containing cefpodoxime proxetil methanesulfonate of formula (II 1 ) having a diastereomeric ratio of (R/R+S) between 0.5 to 0.6 and subsequent neutralization of the methaneulfonate salt (II 1 ) with a base to give cefpodoxime proxetil (I) free of impurities and having a diastereomeric ratio of (R/R+S) between 0.5 to 0.6.
    • 公开了一种获得符合药典规格的高纯度的式(I)头孢泊肟酯的方法。 该方法包括将甲磺酸水溶液加入到有机溶剂中的式(I)不纯的头孢泊肟酯的溶液中以形成式(II')的相应头孢泊肟甲磺酸盐,然后加入共 溶剂和分离含有非对映异构体比率(R / R + S)为0.5至0.6的随后中和甲磺酸盐(II')与式(II.1)的头孢泊肟甲磺酸酯前体甲酯磺酸酯 提供不含杂质的头孢泊肟酯(I)和(R / R + S)的非对映异构体比例在0.5至0.6之间的碱,或将式(I)的不饱和头孢泊肟原料与甲磺酸水溶液相加 在水中形成式(II <1>)的头孢泊肟甲磺酸酯的相应溶液,然后依次加入第一有机溶剂和助溶剂,并分离含有头孢泊肟原料的水相 具有0.5〜0.6的非对映异构体比例(R / R + S)为0.5〜0.6的甲磺酸盐(II)与甲磺酸盐(II 1)与碱中和,得到头孢泊肟酯(I) 杂质,(R / R + S)的非对映体比例在0.5〜0.6之间。