- Preparation method of chlorpromazine hydrochloride
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The invention relates to a preparation method of chlorpromazine hydrochloride, and belongs to the technical field of medicine preparation. According to the method, 2-chlorophenothiazine and N, N-dimethyl-3-chloropropylamine are used as raw materials, an N-methyl pyrrolidone organic solvent is adopted, chlorpromazine is generated under the action of a 4-dimethylaminopyridine catalyst, the obtained chlorpromazine and hydrogen chloride gas are salified, and chlorpromazine hydrochloride is obtained. According to the method, a toxic toluene reagent is not needed, and an N-methyl pyrrolidone organic solvent is adopted, so that the method is more environment-friendly, and is more beneficial to recovery of chlorpromazine, and the yield and purity of chlorpromazine are improved. A large amount of sodium hydroxide does not need to be added, sodium hydroxide and tetrabutylammonium bromide in an original process can be replaced by selecting 4-dimethylaminopyridine, and the yield and purity of chlorpromazine hydrochloride are remarkably improved. By controlling the conditions of the salt forming reaction of hydrochloric acid, the crystallization and purification of chlorpromazine hydrochloride are facilitated, and high-purity chlorpromazine hydrochloride can be obtained.
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Paragraph 0018; 0025-0051
(2021/09/26)
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