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Chemistry and Industry of Forest Products ›› 2022, Vol. 42 ›› Issue (5): 45-55.doi: 10.3969/j.issn.0253-2417.2022.05.007

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Synthesis, Antifungal Activity and 3D-QSAR Study of Novel 1, 3, 4-Thiadiazole-Thiourea Compounds Containing gem-Dimethylcyclopropane Ring

Renxuan ZOU, Wengui DUAN(), Guishan LIN, Baoyu LI, Yucheng CUI   

  1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
  • Received:2021-12-17 Online:2022-10-28 Published:2022-11-02
  • Contact: Wengui DUAN E-mail:wgduan@gxu.edu.cn
  • About author:段文贵,教授,博士生导师,主要从事生物质资源化学和有机合成研究; E-mail: wgduan@gxu.edu.cn

Abstract:

A series of novel 1, 3, 4-thiadiazole-thiourea compounds containing gem-dimethylcyclopropane ring 8a-8t were designed and synthesized by multi-step reactions in search of novel antifungal molecules. Structures of all target compounds were characterized by FT-IR, 1H NMR, 13C NMR, ESI-MS and elemental analysis. The antifungal activities of the target compounds were preliminarily evaluated. The bioassay results revealed that, at 50 mg/L, the inhibitory rate of compound 8l(R=m-BrC6H4) against P.piricola was 79.5%, which was better than that of the positive control chlorothalonil. In order to design more effective antifungal compounds against P.piricola, analysis of the three-dimensional quantitative structure-activity relationship(3D-QSAR) was performed using the comparative molecular field analysis(CoMFA) method. The reasonable and effective 3D-QSAR model(r2=0.991, q2=0.514) was established.

Key words: 3-carene, gem-dimethylcyclopropane ring, 1, 3, 4-thiadiazole-thiourea, antifungal activity, 3D-QSAR

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