申请人:Singh Pal Girij
公开号:US20070149604A1
公开(公告)日:2007-06-28
A process for preparation of crystalline perindopril erbumine of formula (II)
which exhibits the X-ray (powder) diffraction pattern like that shown in FIG.
2
The process comprises reacting a solution of perindopril of formula (I),
in a solvent selected from N,N-dimethylformamide, dimethyl acetals of lower aliphatic aldehydes, dimethyl ketals of lower aliphatic ketones and 1,2-dialkoxyethane with tertiary butylamine and crystallization of the erbumine salt thus obtained by heating the reaction mixture to reflux, filtering hot, cooling gradually to 20° C. to 30° C., and further cooling to 0° C. to 15° C. for 30 minutes to 1 hour and finally filtering off and drying the crystals.
一种制备式(II)晶体型的依普利酸厄贝林的方法,其展现出类似于图2所示的X射线(粉末)衍射图谱。该方法包括在从N,N-二甲基甲酰胺、低级脂肪醛的二甲基缩醛、低级脂肪酮的二甲基缩酮和1,2-二烷氧基乙烷中选择的溶剂中反应式(I)的依普利酸溶液,与叔丁胺反应,并通过将反应混合物加热至回流,过滤热,逐渐冷却至20°C至30°C,然后进一步冷却至0°C至15°C,保持30分钟至1小时,最后过滤并干燥晶体来结晶得到厄贝林盐。