申请人:Nippon Shinyaku Co., Ltd.
公开号:EP2354144A1
公开(公告)日:2011-08-10
A main object is to provide a crystal of 6-fluoro-1-methyl-7-[4-(5-methyl-2-oxo-1,3-dioxolen- 4-yl)-methyl-1-piperazinyl]-4-oxo-4H-[1,3]thiazeto [3,2-a]quinoline-3-carboxylic acid acetonitrile solvate (Compound B) which is an intermediate for producing preferentially the type III crystal of 6-fluoro-1-methyl-7-[4-(5-methyl-2-oxo-1,3-dioxolen- 4-yl)methyl-1-piperazinyl]-4-oxo-4H-[1,3]-thiazeto [3,2-a]quinoline-3-carboxylic acid (Compound A).
A crystal of Compound B can be preferentially precipitated by controlling the supersaturation concentration in crystalization using acetonitrile as a solvent. Subsequently, the type III crystal of Compound A can be produced by performing desolvation of the crystal.
主要目的是提供一种 6-氟-1-甲基-7-[4-(5-甲基-2-氧代-1,3-二氧戊环-4-基)-甲基-1-哌嗪基]-4-氧代-4H-[1,3]噻唑并[3、化合物 B 是生产 6-氟-1-甲基-7-[4-(5-甲基-2-氧代-1,3-二氧戊环-4-基)甲基-1-哌嗪基]-4-氧代-4H-[1,3]-噻唑并[3,2-a]喹啉-3-羧酸(化合物 A) III 型晶体的中间体。
在以乙腈为溶剂的结晶过程中,通过控制过饱和度浓度,可以优先析出化合物 B 的晶体。随后,通过对晶体进行脱溶剂处理,可生成化合物 A 的 III 型晶体。