Design, Synthesis, and Biological Evaluation of Novel Camphor-Based Hydrazide and Sulfonamide Derivatives as Laccase Inhibitors against Plant Pathogenic Fungi/Oomycetes
作者:Zihui Yang、Xuebao Sun、Yigui Qiu、Daojun Jin、Yiming Zheng、Jia Li、Wen Gu
DOI:10.1021/acs.jafc.3c02966
日期:2023.10.4
discover novel natural product-based fungicidal agrochemicals, 41 novel camphanic acid hydrazide and camphor sulfonamide derivatives were designed, synthesized, and tested for their antifungal profile against four plant pathogenic fungi and three oomycetes. As a result, some derivatives presented pronounced inhibitory activities toward Botryosphaeria dothidea, Fusarium graminearum, Phytophthora capsici
为了发现基于天然产物的新型杀菌农用化学品,设计、合成了 41 种新型樟脑酸酰肼和樟脑磺酰胺衍生物,并测试了它们对四种植物病原真菌和三种卵菌的抗真菌特性。结果,一些衍生物对葡萄孢菌、禾谷镰刀菌、辣椒疫霉和烟草疫霉表现出显着的抑制活性。特别是,化合物4b表现出最有效的抗B. dothidea活性(EC 50 = 1.28 mg/L),比阳性对照百菌清强得多。体内试验表明,4b对受B. dothidea感染的苹果果实具有显着的保护和治疗作用。初步抗真菌机制研究表明,4b能明显增强细胞膜通透性,破坏菌丝表面形态和细胞超微结构,降低B. dothidea麦角甾醇和胞外多糖含量。此外,4b在体外显示出有效的漆酶抑制活性,IC 50值为11.3 μM,优于阳性对照半胱氨酸。分子对接研究表明,4b可以通过与口袋中的关键残基形成多重相互作用,很好地对接到漆酶的活性位点。大鼠急性经口毒性试验显示4b有轻微毒性,LD