SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 62 ›› Issue (10): 217-224.DOI: 10.1016/j.cjche.2023.04.003

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A simple hydroxypyridine ionic liquids for conversion of CO2 into quinazoline-2,4(1H,3H)-diones under atmospheric conditions

Bowen Jiang1, Meiling Weng1, Jigang An1, Yuewei Fan1, Jia Liu1, Ying Liu1, Ting Yu1, Leizhi zheng2, Guoqiang Yang1, Zhibing Zhang1   

  1. 1. School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;
    2. School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
  • Received:2022-12-22 Revised:2023-04-05 Online:2023-12-23 Published:2023-10-28
  • Contact: Guoqiang Yang,E-mail:ygq@nju.edu.cn;Zhibing Zhang,E-mail:zbzhang@nju.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (22278202) and the Natural Science Foundation of Jiangsu Province (BM2018007, BK20210185).

A simple hydroxypyridine ionic liquids for conversion of CO2 into quinazoline-2,4(1H,3H)-diones under atmospheric conditions

Bowen Jiang1, Meiling Weng1, Jigang An1, Yuewei Fan1, Jia Liu1, Ying Liu1, Ting Yu1, Leizhi zheng2, Guoqiang Yang1, Zhibing Zhang1   

  1. 1. School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;
    2. School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
  • 通讯作者: Guoqiang Yang,E-mail:ygq@nju.edu.cn;Zhibing Zhang,E-mail:zbzhang@nju.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (22278202) and the Natural Science Foundation of Jiangsu Province (BM2018007, BK20210185).

Abstract: The transformation of CO2 into high value-added product is a promising pathway for utilizing CO2. However, the process tends to require harsh reaction conditions owing to CO2 chemical inertness. Designing a high efficiency catalytic system with environmentally benign characteristic are important determinants. In this work, protic ionic liquids [TMG][2-OPy] were prepared via one-step neutralization between 1,1,3,3-tetramethylguanidine and 2-hydroxypyridine, applying to the domain of synthesizing quinzoline-2,4(1H,3H)-diones from CO2 and 2-aminobenzontiles without any solvent or metal, achieving the yield of 97% at 90 ℃ for 8 h under atmospheric. A series of substrates with good to acceptable yield were detected, revealing the generality and universality of the catalyst. Furthermore, the system could be facilely reused for at least six runs, retaining the yield of 94%. A preliminary kinetic equation is calculated with the activation energy of 68 kJ·mol-1, and a plausible reaction mechanism was put forward. This study highlights that the [TMG][2-OPy] enables to activate CO2 carboxylation efficiently.

Key words: CO2 conversion, Homogeneous catalyst, Ionic liquids, Reaction kinetic

摘要: The transformation of CO2 into high value-added product is a promising pathway for utilizing CO2. However, the process tends to require harsh reaction conditions owing to CO2 chemical inertness. Designing a high efficiency catalytic system with environmentally benign characteristic are important determinants. In this work, protic ionic liquids [TMG][2-OPy] were prepared via one-step neutralization between 1,1,3,3-tetramethylguanidine and 2-hydroxypyridine, applying to the domain of synthesizing quinzoline-2,4(1H,3H)-diones from CO2 and 2-aminobenzontiles without any solvent or metal, achieving the yield of 97% at 90 ℃ for 8 h under atmospheric. A series of substrates with good to acceptable yield were detected, revealing the generality and universality of the catalyst. Furthermore, the system could be facilely reused for at least six runs, retaining the yield of 94%. A preliminary kinetic equation is calculated with the activation energy of 68 kJ·mol-1, and a plausible reaction mechanism was put forward. This study highlights that the [TMG][2-OPy] enables to activate CO2 carboxylation efficiently.

关键词: CO2 conversion, Homogeneous catalyst, Ionic liquids, Reaction kinetic