Novel Camphor Sulfonohydrazide and Sulfonamide Derivatives as Potential Succinate Dehydrogenase Inhibitors against Phytopathogenic Fungi/Oomycetes
作者:Zihui Yang、Xuebao Sun、Daojun Jin、Yigui Qiu、Linlin Chen、Lu Sun、Wen Gu
DOI:10.1021/acs.jafc.2c05628
日期:2023.1.11
To discover novel fungicidal agrochemicals for treating wheat scab, 39 novel camphor sulfonohydrazide/sulfonamide derivatives 4a–4t and 6a–6s were designed and synthesized. In the in vitro antifungal/antioomycete assay, compounds 4g, 4n, and 4o displayed significant inhibitory activities against Fusarium graminearum, Botryosphaeria dothidea, and Phytophthora capsici. Among them, 4n exhibited the best
为寻找治疗小麦黑星病的新型杀菌农药,设计合成了39种新型樟脑磺酰肼/磺酰胺衍生物4a-4t和6a-6s 。在体外抗真菌/抗卵菌试验中,化合物4g、4n和4o显示出对禾谷镰刀菌、Botryosphaeria dothidea和辣椒疫霉的显着抑制活性。其中,4n对禾谷镰刀菌表现出最好的抗真菌活性,EC为 500.41 mg/L,与吡啶氟菌素处于同一水平。体内实验表明,4n对禾谷镰刀菌具有良好的保护和治疗作用。在抗真菌机制研究中,4n可增加禾谷镰刀菌细胞膜通透性,降低胞外多糖和麦角甾醇含量。扫描电子显微镜(SEM)和透射电子显微镜(TEM)分析表明,4n可以显着破坏菌丝体的表面形态和细胞超微结构,从而干扰禾谷镰刀菌的生长。此外,4n在体外表现出强效的琥珀酸脱氢酶 (SDH) 抑制活性, IC 50值为 3.94 μM,与吡草醚 (IC 50 = 4.07 μM) 等效。分子动力学模拟和对接研究表