A process for the preparation of cefpodoxime proxetil of formula (I), of high purity conforming to pharmacopoeial specifications is disclosed. The process comprises a) adding hydrogen halide to a solution of impure cefpodoxime proxetil in an organic solvent and isolating the hydrohalide salt of cefpodoxime proxetil thus formed, (II) Cefpodoxime hydrohalide salt, and b) dissolving the cefpodoxime hydrohalide salt obtained in the above step in a water-miscible or water-immiscible organic solvent and neutralizing the salt thus formed with a base followed by isolation of cefpodoxime proxetil in pure form.
本发明公开了一种制备符合药典规格的高纯度头孢普罗酯(式(I))的方法。该方法包括a)向有机溶剂中的不纯头孢普罗酯前体溶液中加入氢卤酸,并分离得到形成的头孢普罗酯羟卤酸盐(II),b)将上述步骤中获得的头孢普罗酯羟卤酸盐溶解在亲
水性或不亲
水性有机溶剂中,并用碱中和形成的盐,随后分离得到纯头孢普罗酯。