Discovery of Terpene-Derived Quaternary Ring Compounds Containing an Oxime Moiety as Potential Fungicides
作者:Tingmin Pan、Jiuhui Ye、Jiening Li、Kuo Gui、Jian Li、Juntao Feng、Zhiqing Ma、Peng Lei、Yanqing Gao
DOI:10.1021/acs.jafc.2c07387
日期:——
Terpene-derived quaternary ring compounds with an oxime moiety were designed and prepared to create fungicides from natural products. A preliminary assessment of their antifungal activity against seven common pathogenic fungi was conducted, and the median effective concentration (EC50) values against Rhizoctonia solani were obtained. The effects of compound 6a19 (3-bromothiophene-containing), which
设计并制备了具有肟部分的萜烯衍生季环化合物,以从天然产物中制备杀菌剂。初步评估了其对7种常见病原真菌的抗真菌活性,获得了对立枯丝核菌的半有效浓度(EC 50 )值。化合物6a 19 (含3-溴噻吩)具有出色的EC 50值(1.62 μg/mL),对形态、超微结构、活性氧产生、线粒体膜电位、核形态和防御相关的影响并评估了菌丝体的呼吸相关酶活性。据推测,测试化合物会阻碍生物氧化过程,抑制菌丝生长。化合物6a 19对叶鞘感染的水稻植物表现出令人满意的体内防治效果。用50、100和200μg/mL 6a 19处理水稻植物后,保护和治疗功效值分别为48.3和70.3%、58.6和75.7%、69.0和81.1%。此外,利用密度泛函理论计算建立了线性定量构效关系( R 2 = 0.932、 F = 61.3 和S 2 = 0.020)。分析了抗真菌活性至关重要的四个化学描述符:原子占据的电子能级数、最