- 1 - Phenyl - 2, 3 - dimethyl -4 - methylamino pyrazoline -5 - one - N - methyl sulfonic acid magnesium hexahydrate preparation
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This application discloses a 1 - phenyl - 2, 3 - dimethyl - 4 - methylamino pyrazoline - 5 - one - N - methyl sulfonic acid magnesium hexahydrate preparation method. The method comprises dipyrone acid as raw material, the reaction medium with the magnesium salt in the reaction to obtain the 1 - phenyl - 2, 3 - dimethyl - 4 - methylamino pyrazoline - 5 - one - N - methyl sulfonic acid magnesium hexahydrate. The process of the invention is simple, the prepared metamizole magnesium of high yield, high quality and process stability, industrial large-scale production.
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Paragraph 0074-0083
(2019/07/04)
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