Novel 5-Sulfonyl-1,3,4-thiadiazole-Substituted Flavonoids as Potential Bactericides and Fungicides: Design, Synthesis, Three-Dimensional Quantitative Structure–Activity Relationship Studies
作者:Peng Dai、Jian Jiao、Yufei Li、Peng Teng、Qingqing Wang、Yuchuan Zhu、Weihua Zhang
DOI:10.1021/acs.jafc.3c06367
日期:2024.3.27
Compound 2 (EC50 = 0.41 μg/mL) displayed the most effective inhibitory potency against R. solani in vivo, comparable protective effects with the positive control carbendizam. Preliminary mechanistic studies indicated that compound 2 induced disordered entanglement of hyphae, shrinkage of hyphal surfaces, extravasation of cellular contents, and vacuole swelling and rupture, which disrupted normal hyphal
黄酮类化合物是普遍存在的天然产物,由于其结构多样性、广谱药理活性和优异的环境相容性,为药物发现提供了来源。为了开发具有新颖作用机制和创新结构的抗菌和抗真菌药物,设计并合成了一系列新型5-磺酰基-1,3,4-噻二唑取代的黄酮类化合物,并评估了它们对七种农业常见植物病原微生物的生物活性。抗菌生物测定结果表明,大部分目标化合物对米黄单胞菌、立枯丝核菌和炭疽病菌均表现出良好的抑制作用。化合物1、3、7、9、13和14对米叶枯病菌表现出显着的抗菌活性。稻曲霉的 EC 50值低于 10 μg/mL,优于双甲噻唑 (70.89 μg/mL)。化合物2 (EC 50 = 0.41 μg/mL)在体内对立枯丝核菌表现出最有效的抑制效力,其保护作用与阳性对照多菌灵相当。初步机理研究表明,化合物2诱导菌丝无序缠结、菌丝表面收缩、细胞内容物外渗以及液泡膨胀和破裂,从而扰乱了正常菌丝生长。随后,基于可靠的三维定量构