Discovery of <i>N</i>-Phenylpropiolamide as a Novel Succinate Dehydrogenase Inhibitor Scaffold with Broad-Spectrum Antifungal Activity on Phytopathogenic Fungi
作者:Yu-Hao Zhang、Shan-Shan Yang、Qi Zhang、Tian-Tian Zhang、Tian-Yi Zhang、Bo-Hang Zhou、Le Zhou
DOI:10.1021/acs.jafc.2c07712
日期:2023.3.1
Based on the structural features of both succinate dehydrogenase inhibitors (SDHIs) and targeted covalent inhibitors, a series of N-phenylpropiolamides containing a Michael acceptor moiety were designed to find new antifungal compounds. Nineteen compounds showed potent inhibition activity in vitro on nine species of plant pathogenic fungi. Compounds 9 and 13 showed higher activity on most of the fungi
基于琥珀酸脱氢酶抑制剂 (SDHI) 和靶向共价抑制剂的结构特征,设计了一系列含有迈克尔受体部分的N-苯基丙酰胺,以寻找新的抗真菌化合物。十九种化合物在体外对九种植物病原真菌显示出有效的抑制活性。化合物9和13对大多数真菌表现出比标准药物嘧菌酯更高的活性。化合物13可完全抑制Physalospora piricola在 200 μg/mL 的浓度下感染苹果超过 7 天,并且在≤100 μg/mL 的浓度下对植物的种子萌发和幼苗生长表现出高度安全性。作用机制表明,13是一种SDH抑制剂,中值抑制浓度IC 50为0.55 μg/mL,与阳性药物啶酰菌胺相当。分子对接研究表明,13可以通过氢键与SDH的泛醌结合区很好地结合,并发生π-烷基相互作用和π-阳离子相互作用。在细胞水平上,1作为母体化合物可以破坏P. piricola的菌丝结构并部分溶解细胞壁和/或细胞膜。构效关系分析表明,乙炔基应该是