Chinese Journal of Organic Chemistry ›› 2022, Vol. 42 ›› Issue (11): 3784-3797.DOI: 10.6023/cjoc202204055 Previous Articles     Next Articles

ARTICLES

含偕二甲基环丙烷结构的1,3,4-噻二唑-脲化合物的合成、抑菌活性及分子对接研究

崔玉成, 陈美桦, 林桂汕*(), 段文贵*(), 李晴敏, 邹壬萱, 岑波   

  1. 广西大学化学化工学院 南宁 530004
  • 收稿日期:2022-04-22 修回日期:2022-05-31 发布日期:2022-07-13
  • 通讯作者: 林桂汕, 段文贵
  • 作者简介:
    †共同第一作者
  • 基金资助:
    国家自然科学基金(31870556); 广西大学生创新创业训练计划(202110593182)

Synthesis, Antifungal Activity and Molecular Docking Study of 1,3,4-Thiadiazole-Urea Compounds Containing gem-Dimethylcyclopropane Ring Structure

Yucheng Cui, Meihua Chen, Guishan Lin(), Wengui Duan(), Qingmin Li, Renxuan Zou, Bo Cen   

  1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004
  • Received:2022-04-22 Revised:2022-05-31 Published:2022-07-13
  • Contact: Guishan Lin, Wengui Duan
  • About author:
    †These authors contributed equally to this work.
  • Supported by:
    National Natural Science Foundation of China(31870556); College Student Innovation and Entrepreneurship Training Program of Guangxi(202110593182)

In an attempt to search for natural renewable product-based antifungal agents, eighteen 1,3,4-thiadiazole-urea compounds containing gem-dimethylcyclopropane ring structure were designed and synthesized. The antifungal activity of the target compounds against six plant pathogens was preliminarily evaluated at the concentration of 50 mg/L. As a result, the inhibitory rates of (+)-cis-1-(4-bromophenyl)-3-(5-((2,2-dimethyl-3-propylcyclopropyl)methyl)-1,3,4-thiadiazol-2-yl) urea (7i) against Colletotrichum orbicular, Bipolaris maydis and Alternaria solani were 91.2%, 85.0% and 60.1%, respectively, which was better than that of the positive control chlorothalonil. Furthermore, a reasonable and effective 3D-quantitative structure-activity relationship (3D-QSAR) model (r2=0.990, q2=0.517) was established by the comparative molecular field analysis method (CoMFA). The binding mode between the target compounds and succinate dehydrogenase (SDH) was investigated by molecular docking, and the cation-π interaction between the key residue Arg and the benzene ring was quantitatively analyzed. The gem-dimethylcyclopropane and thiadiazole-urea-benzene moieties of the target compounds probably made major contributions to the antifungal activity by frontier molecular orbital calculation.

Key words: 3-carene, gem-dimethylcyclopropane, 1,3,4-thiadiazole-urea, antifungal activity, 3D-quantitative structure- activity relationship (3D-QSAR), molecular docking