[EN] NOVEL PROCESS FOR THE PREPARATION OF CILASTATIN SODIUM SALT<br/>[FR] NOUVEAU PROCEDE DE PREPARATION D'UN SEL DE SODIUM DE CILASTATINE
申请人:DONG KOOK PHARM CO LTD
公开号:WO2006022511A1
公开(公告)日:2006-03-02
The present invention relates to a novel process for preparing cilastatin sodium salt used asa dehydropeptidase 1 inhibitor. The novel method of the present invention could prevent the formation of (E)-isomer from the preparation of intermediate for preparing cilastatin sodium, i.e., (Z)-7-chloro-2-((S)-2,2-dimethylcyclopropanecarboxarnido)-2-heptenoic acid metal salt and isolate the intermediate in situ providing simpler process with high yield and purity. Furthermore, it can provide with highly pure cilastatin sodium salt by isolating novel cilastatin amine salt and using by sodium hydroxide and cationic exchange resin. Accordingly, the method can be very useful in preparing cilastatin sodium salt with high yield and high purity.