113011-13-5Relevant articles and documents
Domiphen impurity synthesis method
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Paragraph 0042; 0046-0051; 0057; 0061, (2020/08/09)
The invention discloses a domiphen impurity synthesis method. The method comprises the following steps: S1, dissolving phenol in a solvent A, adding a substance B, carrying out heating, carrying out aheat-preserved reaction, dropwise adding a dimethylaminochloroethane solution, carrying out refluxing, and performing purifying to obtain N,N-dimethyl-2-phenoxyethylamine; and S2, subjecting 1-bromotetradecane and the N,N-dimethyl-2-phenoxyethylamine obtained in the step S1 to refluxing in a solvent C, then carrying out crystallizing, and performing drying to obtain brominated N,N-dimethyl-N-(2-phenoxyethyl)-1-tetradecylamine; or subjecting 1-bromodecane and the N,N-dimethyl-2-phenoxyethylamine obtained in the step S1 to refluxing in ethyl acetate, then carrying out crystallizing, and performing drying to obtain brominated N,N-dimethyl-N-(2-phenoxyethyl)-1-decylamine. The method of the invention has the advantages of short synthesis route, mild reaction conditions, few pollutants, high product purity, high yield, economical performance and environmental protection performance.