Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (6): 20220078.doi: 10.7503/cjcu20220078

• Physical Chemistry • Previous Articles     Next Articles

Preparation of Ethyl αCyanocinnamate Catalyzed by Nitrogen-rich Porous Organic Polymers

GAO Wenxiu, LYU Jieqiong, GAO Yongping, KONG Changjian, WANG Xueping, GUO Shengnan, LOU Dawei()   

  1. School of Chemical and Pharmaceutical Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China
  • Received:2022-02-04 Online:2022-06-10 Published:2022-04-04
  • Contact: LOU Dawei E-mail:dwlou@jlict.edu.cn
  • Supported by:
    the Project of Science and Technology Development of Jilin Province, China(2020122373JC);the Research and Development Project for Industrial Technology of Jilin Province, China(2020C028-1);the Project of Science and Technology of the Education Department of Jilin Province, China(JJKH20200240KJ);the Talents Project for Innovation and Entrepreneurship of Jilin Province, China(2020030)

Abstract:

Ethyl α-cyanocinnamate, an electron-deficient olefin containing various functional groups, is a highly suitable substrate for organic synthesis reactions. It is mainly obtained by catalytic Knoevenagel condensation reaction. Nitrogen-rich porous organic polymer mPMF was prepared by the solvothermal method using paraformaldehyde and melamine as substrates, and K2CO3-mPMF-XX=1, 10, 50) was obtained by K2CO3 treatment. The catalytic performance of mPMF in the Knoevenagel condensation reaction of benzaldehyde and ethyl cyanoacetate was discussed. To investigate the effect of basicity on the Knoevenagel condensation reaction by comparing the catalytic activity of mPMF and K2CO3-mPMF-X. The catalytic reaction mechanism was initially explored. The experimental performance indicates that the abundance of nitrogen species in the catalyst provides a basic environment and a lot of basic active sites for the reaction. Control of catalyst basicity is an essential factor in the catalytic synthesis of ethyl α-cyanocinnamate. The reaction of mPMF in methanol solvent at 60 ℃ for 3 h resulted in 97% conversion of benzaldehyde and over 99.9% selectivity of the target product.

Key words: Nitrogen-rich porous organic polymer, Catalyst, Knoevenagel condensation reaction

CLC Number: 

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