1224935-95-8Relevant academic research and scientific papers
Preparation method of 1-cyclohexylpiperazine
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Paragraph 0025-0027, (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.
A Survey of the Borrowing Hydrogen Approach to the Synthesis of some Pharmaceutically Relevant Intermediates
Leonard, John,Blacker, A. John,Marsden, Stephen P.,Jones, Martin F.,Mulholland, Keith R.,Newton, Rebecca
, p. 1400 - 1410 (2015/11/02)
The use of the "borrowing hydrogen strategy" in the synthesis of a number of typical pharmaceutical intermediates has been investigated. The main aim of this work was to investigate the scope and limitations of current methodology using standard laboratory techniques in an industrial context. Some interesting and significant results were achieved across a diverse set of complex substrates; however several drawbacks with this approach were identified, such as the high loading, poor turnover, and susceptibility to substrate inactivation of the catalysts. These are areas which are highlighted for future investigation and improvements.
ANALGESIC THAT BINDS FILAMIN A
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Page/Page column 84, (2010/05/14)
A compound, composition and method are disclosed that can provide analgesia. A contemplated compound has a structure that corresponds to Formula A, wherein A, B, X, R1, R2, R7 and R8, and the dashed lines are defined within.
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.
