245487-40-5Relevant academic research and scientific papers
Preparation method of 1-cyclohexylpiperazine
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Paragraph 0028-0030, (2021/04/14)
The invention discloses a preparation method of 1-cyclohexylpiperazine. The method comprises the steps of carrying out reflux reaction on cyclohexyl halide, 1-Boc-piperazine and inorganic base in an organic solvent, filtering after the reaction is finished, and concentrating to obtain an intermediate 1; removing Boc from the intermediate 1 under an acidic condition, drying by distillation after the reaction is finished, pulping with isopropanol, and filtering to obtain solid 1-cyclohexyl piperazine hydrochloride; dissolving with water, adding an inorganic base to adjust the pH value to 12 to 14, extracting with an extraction solvent, drying the solvent by distillation to obtain a crude product of 1-cyclohexylpiperazine, and carrying out reduced pressure distillation on the crude product through an oil pump to obtain a pure product of 1-cyclohexylpiperazine. In the synthesis process of the intermediate 1, use of sodium triacetoxyborohydride and sodium hydroxide is avoided, the production cost is greatly saved, meanwhile, only filtering is needed for aftertreatment, the method is very simple, and time and labor are saved.
PIPERAZINYL AND DIAZAPANYL BENZAMIDES AND BENZTHIOAMIDES
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Page 72, (2008/06/13)
Substituted piperazinyl and diazepanyl benzamides and benzthioamides of formula (I), compositions containing them, and methods of making and using them to treat histamine-mediated conditions.
