申请人:PARTHASARADHI REDDY Bandi
公开号:US20110136855A1
公开(公告)日:2011-06-09
The present invention provides a novel process for the preparation of gemifloxacin and its pharmaceutically acceptable acid addition salts in high yield. The present invention also relates to novel polymorphs of gemifloxacin free base and its hydrates to the processes for their preparation and to pharmaceutical compositions comprising them. The present invention also relates to infusion solutions of gemifloxacin and to processes for their preparation. Thus, 7-chloro-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydro-1,8-naphth-yridine-3-carboxylic acid is reacted with a mixture of acetic anhydride, acetic acid and boric acid to give borane compound, which is then treated with 4-Aminomethyl-3-methoxyimino-pyrrolidinium dimethanesulfonate in presence of triethylamine, followed by treatment with 3.5% sodium hydroxide solution to give gemifloxacin free base.
本发明提供了一种制备吉米沙星及其药学上可接受的酸盐的新方法,其产率高。本发明还涉及吉米沙星游离碱的新多晶形态及其水合物的制备方法,以及包含它们的制药组合物。本发明还涉及吉米沙星的输注溶液及其制备方法。因此,7-氯-1-环丙基-6-氟-4-氧代-1,4-二氢-1,8-萘啉-3-羧酸与乙酸酐、乙酸和硼酸混合物反应,得到硼烷化合物,然后在三乙胺的存在下,用4-氨基甲基-3-甲氧基亚胺吡咯烷二甲磺酸盐处理,随后用3.5%的氢氧化钠溶液处理,得到吉米沙星游离碱。