Crystalline dihydrochloride of cephalosporin derivative and a method for preparation thereof
申请人:MEIJI SEIKA KAISHA LTD.
公开号:EP0363826A2
公开(公告)日:1990-04-18
The crystalline dihydrochloride of a specific cephalosporin derivative is stable to heat and retains its antibacterial activity even after storage over long periods at high temperature. The crystalline dihydrochloride can be obtained by removing protective groups from the cephalosporin derivative wherein the amino group and carboxy groups are protected and then crystallizing the cephalosporin derivative from a hydrochloric acid aqueous solution. The crystalline dihydrochloride is useful for pharmaceutical preparations.
特定头孢菌素衍生物的结晶二盐酸盐对热稳定,即使在高温下长期储存也能保持其抗菌活性。晶体二盐酸盐可通过去除头孢菌素衍生物上的保护基团(其中氨基和羧基受到保护),然后从盐酸水溶液中结晶头孢菌素衍生物而获得。结晶的二盐酸盐可用于药物制剂。