反应详情

N-[2-[[[5-(Dimethylamino)methyl-2-furanyl]methyl]thio]ethyl]-N'-methyl-2-nitro-1,1-ethenediamine (5 g) was dissolved in n-propanol (40 ml) containing molar equivalent of hydrogen chloride. Ethyl acetate (20 ml) was added slowly to the solution. It was further stirred for 1 hr. Form 1 ranitidine hydrochloride crystallized during this period, and was filtered off. The product was washed with ethyl acetate (20 ml) and was dried at 40° C. under vacuum to give Form 1 ranitidine hydrochloride (5 g), m.p. 136°-137° C., DSC peak temperature=144° C., purity=99.6% (HPLC).

1. customForm 1 ranitidine hydrochloride crystallized during this period
2. filtrationwas filtered off
3. washThe product was washed with ethyl acetate (20 ml)
4. customwas dried at 40° C. under vacuum