Chinese Journal of Organic Chemistry ›› 2025, Vol. 45 ›› Issue (12): 4375-4383.DOI: 10.6023/cjoc202501004 Previous Articles     Next Articles

ARTICLES

一种新型Zn(II)配合物绿色催化合成2-取代-2,3-二氢喹唑啉-4(1H)-酮

杨瑞杰, 王鑫, 朱志慧, 徐一铭, 宋志国, 王敏*()   

  1. 渤海大学化学与材料工程学院 辽宁锦州 121013
  • 收稿日期:2025-04-10 修回日期:2025-05-25 发布日期:2025-08-18
  • 通讯作者: 王敏
  • 基金资助:
    教育部产学合作协同育人2024年第一批次(230805940290824)

Green Synthesis of 2-Substituted-2,3-dihydroquinazolin-4(1H)-ones Catalyzed by a Novel Zn(II) Complex

Ruijie Yang, Xin Wang, Zhihui Zhu, Yiming Xu, Zhiguo Song, Min Wang*()   

  1. College of Chemistry and Materials Engineering, Bohai University, Jinzhou, Liaoning 121013
  • Received:2025-04-10 Revised:2025-05-25 Published:2025-08-18
  • Contact: Min Wang
  • Supported by:
    Industry-University Collaborative Education Project of the First Batch in 2024, Ministry of Education(230805940290824)

A new zinc complex [Zn(btx)2(H2O)4]•(p-OHC6H4SO3)4 was synthesized from zinc sulfate tetrahydrate (ZnSO4• 4H2O), sodium 4-hydroxybenzenesulfonate dihydrate (C6H5NaO4S•2H2O) and 1,6-bis(1H-1,2,4-triazole)hexane (btx) under solvothermal conditions. It was characterized by X-ray single crystal diffraction, infrared spectrum, X-ray powder diffraction, nitrogen adsorption-desorption test and scanning electron microscope. The catalytic performance of the complex in the synthesis of 2-substituted-2,3-dihydroquinazolin-4(1H)-ones from aromatic aldehydes and o-aminobenzamide was investigated. The experimental results showed that high yields could be achieved in a short time by using a small amount of catalyst. When the substituent positions on the benzene rings of aromatic aldehydes are identical, the stronger electron-withdrawing capability of the substituents results the higher yields of the products. The Gaussian 16 program was used to optimize the calculation on 16 different aromatic aldehydes with various structures. The calculation results showed that when the positions of the substituents are same, the stronger electron-withdrawing ability of the substituents, the lower lowest unoccupied molecular orbital (LUMO) energy of the aromatic aldehydes, and the higher reactivity, which contributes to the proceed of the reactions. This is consistent with the conclusion of the catalytic experiments. Finally, the active sites of the zinc complex were deduced by density functional theory, and the possible reaction mechanism of the zinc complex as a catalyst for the synthesis of 2-substituted-2,3-di- hydroquinazolin-4(1H)-one is described.

Key words: 2-substituted-2,3-dihydroquinazolin-4(1H)-one, zinc complex, theoretical calculation, catalytic mechanism