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Discovery Of Luotonin A Analogues As Potent Fungicides And Insecticides: Design, Synthesis And Biological Evaluation Inspired By Natural Alkaloid

文献类型： 外文期刊

作者： Yang, GZ; Zhang, J; Peng, JW; Zhang, ZJ; Zhao, WB; Wang, RX; Ma, KY; Li, JC; Liu, YQ; Zhao, ZM; Shang, XF

作者机构：

关键词： Luotonin A; Insecticidal activity; Fungicidal activity; Synthesis

期刊名称： EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY

ISSN： 0223-5234

年卷期： 2020 年 194 卷

页码：

收录情况： JCR（2021版）

摘要： The prevention and control of plant diseases and insect pests is the most crucial issue facing crop protection. To discover novel pesticide candidates with diverse chemical structures from natural products, a series of luotonin A analogues were designed, synthesized and evaluated for their antifungal and insecticidal activities. Most of these compounds exhibited potent activity against Botrytis cinerea, Magnaporthe oryzae and Aphis craccivora. Among them, the antifungal activity of compound 10s against B. cinerea was comparable to azoxystrobin (EC50 = 0.09 mM) and against M. oryzae (EC50 = 0.19 mM) was slightly weaker than that of azoxystrobin (EC50 = 0.17 mM). Compounds 10k and 10o are the most active compounds against A. craccivora having identical mortality value of 42.05% at 50 mu g/mL, respectively, which were slightly lower than pymetrozine (51.14%) at the same concentration. Revealed morphological changes of the fungal cell surface by scanning electron microscopy indicated that luotonin A analogues might exert their antifungal activity by destroying fungal cell membrane and cell wall. Furthermore, the results of the in vivo protective and curative activities of the compound lOs against S. sclerotiorum and B. cinerea showed that the curative effect was stronger than its protective effect and the curative effects reached 67.17% and 73.82% at 80 mu g/mL respectively. The above results further demonstrated the potential of luotonin A analogues as novel fungicides and insecticides. (C) 2020 Elsevier Masson SAS. All rights reserved.

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