CRYSTAL OF CEPHALOSPORIN INTERMEDIATE 7alpha-METHOXY CEPHALOTHIN AND METHOD FOR PREPARING SAME
申请人:QILU ANTI PHARMACEUTICAL CO. LTD.
公开号:US20200131197A1
公开(公告)日:2020-04-30
The present invention relates to a crystal of cephalosporin intermediate 7α-methoxy cephalothin (I) and a method for preparing same. The crystal of 7α-methoxy cephalothin (I) undergoes Cu-Ka radiation and X-ray powder diffraction expressed in terms of angle 2θ; the crystal of 7α-methoxy cephalothin (I) has characteristic absorption peaks at positions of 7.34°±0.20°, 12.71°±0.20°, 14.25°±0.20°, 14.68°±0.20°, 16.52°±0.20°, 17.99°±0.20°, 19.98°±0.20°, and 22.69°±0.20°. The crystal of 7α-methoxy cephalothin provided by the present invention is easy to prepare. Related test data shows that the crystal of 7α-methoxy cephalothin has high purity, low impurity content, and good stability. The preparation cost is low, the preparation method is simple to operate, conditions are mild and easy to control, and crystals of 7α-methoxy cephalothin can be obtained stably. The invention is applicable to industrial production.
本发明涉及头孢菌素中间体7α-甲氧基头孢噻啶(I)的晶体及其制备方法。7α-甲氧基头孢噻啶(I)的晶体经Cu-Ka辐射和X射线粉末衍射表达为2θ角度;7α-甲氧基头孢噻啶(I)的晶体在7.34°±0.20°、12.71°±0.20°、14.25°±0.20°、14.68°±0.20°、16.52°±0.20°、17.99°±0.20°、19.98°±0.20°和22.69°±0.20°处具有特征吸收峰。本发明提供的7α-甲氧基头孢噻啶晶体易于制备。相关测试数据显示,7α-甲氧基头孢噻啶晶体具有高纯度、低杂质含量和良好稳定性。制备成本低,制备方法操作简单,条件温和且易于控制,可稳定获得7α-甲氧基头孢噻啶晶体。该发明适用于工业生产。