Potential Succinate Dehydrogenase Inhibitors Bearing a Novel Pyrazole-4-sulfonohydrazide Scaffold: Molecular Design, Antifungal Evaluation, and Action Mechanism
作者:Jian-Qi Chai、Yu-Dong Mei、Lang Tai、Xiao-Bin Wang、Min Chen、Xiang-Yi Kong、Ai-Min Lu、Guo-Hua Li、Chun-Long Yang
DOI:10.1021/acs.jafc.3c00126
日期:2023.6.21
Aiming to develop novel antifungal agents with a distinctive molecular scaffold targeting succinate dehydrogenase (SDH), 24 N′-phenyl-1H-pyrazole-4-sulfonohydrazide derivatives were first devised, synthesized, and verified by 1H NMR, 13C NMR, high-resolution mass spectrometry (HRMS), and single-crystal X-ray diffraction analysis. The bioassays revealed that the target compounds possessed highly efficient
为了开发具有靶向琥珀酸脱氢酶(SDH)的独特分子支架的新型抗真菌剂,首先设计、合成了24 N'-苯基-1 H-吡唑-4-磺酰肼衍生物,并通过1 H NMR、13 C NMR 验证,高分辨率质谱(HRMS)和单晶X射线衍射分析。生物测定结果表明,目标化合物对四种供试植物病原真菌立枯丝核菌(R. solani)、灰葡萄孢、禾谷镰刀菌和黑链格孢具有高效、广谱的抗真菌活性。引人注目的是,复合B6被评估为抗立枯丝核菌的选择性抑制剂,其体外EC 50值 (0.23 μg/mL) 与 thifluzamide (0.20 μg/mL) 相似。相同条件下,200 μg/mL的化合物B6(75.76%)对立枯丝核菌的体内预防效果与thifluzamide(84.31%)大致相当。形态学观察探索表明,化合物B6能强烈破坏菌丝体形态,明显增加细胞膜的通透性,并显着增加线粒体数量。化合物B6还通过 IC 显着抑制