化工进展 ›› 2019, Vol. 38 ›› Issue (11): 4971-4977.DOI: 10.16085/j.issn.1000-6613.2019-0262

• 工业催化 • 上一篇    下一篇

CaC2与CsF活化环己酮与乙腈反应合成环己烯乙腈

姜茂强1,2(),孟洪2,陆颖舟2,李春喜1,2,3()   

  1. 1. 北京化工大学化工资源有效利用国家重点实验室,北京 100029
    2. 北京化工大学化学工程学院,北京 100029
    3. 北京化工大学能源环境催化北京市重点实验室,北京 100029
  • 收稿日期:2019-02-26 出版日期:2019-11-05 发布日期:2019-11-05
  • 通讯作者: 李春喜
  • 作者简介:姜茂强(1994—),男,硕士研究生,研究方向为电石的利用。E-mail:18811720115@163.com
  • 基金资助:
    国家自然科学基金(21776015)

Synthesis of 1-cyclohexenylacetonitrile using cyclohexanone and acetonitrile under synergetic activation of CaC2 and CsF

Maoqiang JIANG1,2(),Hong MENG2,Yingzhou LU2,Chunxi LI1,2,3()   

  1. 1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
    2. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
    3. Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2019-02-26 Online:2019-11-05 Published:2019-11-05
  • Contact: Chunxi LI

摘要:

电石是一种煤化工产品,其强碱性对很多碱催化反应具有潜在的促进作用。本文首次报道了电石和氟化铯对环己酮与乙腈反应的促进作用,考察了反应时间、温度和氟化铯用量对反应的影响。结果表明,氟化铯与环己酮具有强络合作用,可以提高羰基的反应活性;碳化钙不但可通过其去质子化作用来提高乙腈的亲核反应活性,还可促进目标产物的形成。在碳化钙和氟化铯的共同作用下,可实现环己烯乙腈的高效合成,而碳化钙则定量转化为乙炔。在100℃和物料比n 氟化铯n 碳化钙n 环己酮n 乙腈=1∶5.7∶10∶35.5条件下常压回流3h,环己酮的转化率和环己烯乙腈的收率分别达97.5%与87.9%,远高于其他合成方法。本研究提供了一种绿色、高效的1-环己烯乙腈合成新方法,对于研究电石作为强碱性物质促进乙腈与其他羰基化合物反应具有重要借鉴意义。

关键词: 碳化钙, 化学反应, 活化, 合成, 多相反应

Abstract:

CaC2 is a commodity chemical, and is of potential use in some alkaline catalyzed reactions. The synergetic activation effect of CaC2-CsF for the reaction of cyclohexanone (CYC) and acetonitrile (ACN) was reported for the first time. The effects of reaction time, temperature and dosage of activating agents on the reaction were investigated. The results show that the reactivity of CYC is enhanced by the strong complexation between CsF and CYC, and the nucleophilic reactivity of ACN is enhanced via its deprotonation by the strong basicity of CaC2. The reaction proceeds efficiently at mild conditions under synergetic action of CaC2 and CsF, yielding 1-cyclohexenylacetonitrile (1-CAC) and acetylene simultaneously. The present method is much superior to the reported other synthetic methods , 97.5% of CYC conversion and 87.9% of 1-CAC yield can be obtained in 3h at 100℃ (n CsFn CaC2n CYCn ACN=1∶5.7∶10∶35.5). This study provides a novel method for the efficient synthesis of 1-CAC, and the result is instructive for the utilization of CaC2 as a strong base in promoting the reaction of ACN with other carbonyl compounds.

Key words: calcium carbide, chemical reaction, activation, synthesis, multiphase reaction

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