163596-56-3Relevant articles and documents
Synthesis method of cinnamyl piperazine
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Paragraph 0016; ; 0017; 0018; 0019, (2017/08/27)
The invention discloses a synthesis method of cinnamyl piperazine. The method includes the steps of: a) adding a solvent into a reaction kettle and adding piperazine to uniformly dissolve the piperazine, dropwisely adding hydrochloric acid at 20-25 DEG C until the pH of the reaction solution is 2, which is the terminal, and after the reaction is performed for 1 h, cooling the reaction solution to 20 DEG C, and centrifugally spin-filtering the reaction solution to obtain piperazine dihydrochloride; b) adding the solvent into the reaction kettle, adding the piperazine dihydrochloride and the piperazine with stirring at the same time, and performing a reaction at 68-85 DEG C for 0.5-3 h; c) reducing the temperature to 45-55 DEG C, dropwisely adding cinnamyl chloride, and then increasing the temperature to 60-75 DEG C to perform a temperature maintained reaction for 1-4 h, and reducing the temperature to 10-35 DEG C, performing centrifugal separation, sucking a mother liquid into a distillation reaction kettle, heating the distillation mother liquid to recycle the solvent, adding pure water, and dropwisely adding an alkali liquid to regulate the pH to 9-12, and adding chloroform to perform extraction, drying the mixture, and evaporate-drying the chloroform to obtain the cinnamyl piperazine. The synthesis method reduces production steps and pollutant emission, and is more suitable for modern industrial production.
