[EN] A PROCESS FOR THE MANUFACTURE OF CEFPODOXIME PROXETIL<br/>[FR] PROCEDE DE PRODUCTION DE CEFPODOXIME PROXETIL
申请人:LUPIN LTD
公开号:WO2004060896A1
公开(公告)日:2004-07-22
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 (II1), followed by addition of a co-solvent and separation of the aqueous phase containing cefpodoxime proxetil methanesulfonate of formula (II1) having a diastereomeric ratio of (R/R+S) between 0.5 to 0.6 and subsequent neutralization of the methaneulfonate salt (II1) 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 (II1) 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 (II1) having a diastereomeric ratio of (R/R+S) between 0.5 to 0.6 and subsequent neutralization of the methaneulfonate salt (II1) 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.
揭示了一种获得符合药典规格的高纯度头孢普多西酯(分子式为I)的方法。该方法包括将甲磺酸溶液加入到有机溶剂中的不纯头孢普多西酯(分子式为I)溶液中,形成相应的甲磺酸盐(分子式为II1),然后加入共溶剂并分离含有头孢普多西酯甲磺酸盐(分子式II1)的水相,其旋光异构比(R/R+S)介于0.5至0.6之间,随后中和甲磺酸盐(II1)以碱使其生成无杂质的头孢普多西酯(I),其旋光异构比(R/R+S)介于0.5至0.6,或者将不纯头孢普多西酯(分子式I)加入到水中的甲磺酸溶液中,形成相应的头孢普多西酯甲磺酸盐(分子式II1)溶液,然后顺序加入第一有机溶剂和共溶剂,并分离含有头孢普多西酯甲磺酸盐(分子式II1)的水相,其旋光异构比(R/R+S)介于0.5至0.6之间,随后中和甲磺酸盐(II1)以碱使其生成无杂质的头孢普多西酯(I),其旋光异构比(R/R+S)介于0.5至0.6。