A process for preparing form 1 ranitidine hydrochloride

Details A process for preparing form 1 ranitidine hydrochloride A process for preparing form 1 ranitidine hydrochloride

C - Chemistry, Metallurgy

07

D

C07D 307/52 (2006.01)

Patent

CA 2218562

A process for preparing pure N-[2-[[[5-[dimethylamino]-methyl-2- furanyl]methyl]thio]ethyl]-N'-methyl-2-nitro-1,1-ethyldiamine hydrochloride, designated Form 1 ranitidine hydrochloride, from ranitidine in methylene chloride with the addition of hydrochloric acid. The Form 1 ranitidine hydrochloride thus obtained is stable and therefore useful for producing commercial-scale quantities of Form 1 ranitidine hydrochloride.

L'invention concerne un procédé de préparation du chlorhydrate pur de N-[-2-[[[5-[diméthylamino]-méthyl-2-furanyl]méthyl]thio]éthyl]-N'-méthyl-2-nitro-1,1-éthyldiamine, appelé aussi chlorhydrate de ranitidine de forme 1, à partir de la ranitidine dans du chlorure de méthylène, par addition d'acide chlorhydrique. Le chlorhydrate de ranitidine forme 1 ainsi obtenu est stable et il peut être fabriqué d'une manière avantageuse à l'échelle industrielle.

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