Design, Synthesis, and Study of the Insecticidal Activity of Novel Steroidal 1,3,4-Oxadiazoles,Journal of Agricultural and Food Chemistry

当前位置： X-MOL 学术 › J. Agric. Food Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Design, Synthesis, and Study of the Insecticidal Activity of Novel Steroidal 1,3,4-Oxadiazoles
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2021-09-23 , DOI: 10.1021/acs.jafc.1c00088
Shichuang Ma ₁ , Weiqi Jiang ₁ , Qi Li ₁ , Tian Li ₂ , Wenjun Wu _{1,

3} , Hangyu Bai ₄ , Baojun Shi _{1,

3}

Affiliation

A series of novel steroidal derivatives with a substituted 1,3,4-oxadiazole structure was designed and synthesized, and the target compounds were evaluated for their insecticidal activity against five aphid species. Most of the tested compounds exhibited potent insecticidal activity against Eriosoma lanigerum (Hausmann), Myzus persicae, and Aphis citricola. Compounds 20g and 24g displayed the highest activity against E. lanigerum, showing LC₅₀ values of 27.6 and 30.4 μg/mL, respectively. Ultrastructural changes in the midgut cells of E. lanigerum were detected by transmission electron microscopy, indicating that these steroidal oxazole derivatives might exert their insecticidal activity by destroying the mitochondria and nuclear membranes in insect midgut cells. Furthermore, a field trial showed that compound 20g exhibited effects similar to those of the positive controls chlorpyrifos and thiamethoxam against E. lanigerum, reaching a control rate of 89.5% at a dose of 200 μg/mL after 21 days. We also investigated the hydrolysis and metabolism of the target compounds in E. lanigerum by assaying the activities of three insecticide-detoxifying enzymes. Compound 20g at 50 μg/mL exhibited inhibitory action on carboxylesterase similar to the known inhibitor triphenyl phosphate. The above results demonstrate the potential of these steroidal oxazole derivatives to be developed as novel pesticides.

中文翻译：

新型甾体 1,3,4-恶二唑的杀虫活性的设计、合成和研究

设计并合成了一系列具有取代的1,3,4-恶二唑结构的新型甾体衍生物，并评估了目标化合物对五种蚜虫的杀虫活性。大多数测试的化合物表现出对鼠尾草（Hausmann）、桃蚜和柑橘蚜的有效杀虫活性。化合物20g和24g对E. lanigerum 的活性最高，LC ₅₀值分别为 27.6 和 30.4 μg/mL。E. lanigerum中肠细胞的超微结构变化通过透射电子显微镜检测，表明这些甾体恶唑衍生物可能通过破坏昆虫中肠细胞的线粒体和核膜来发挥其杀虫活性。此外，田间试验表明，化合物20g表现出与阳性对照毒死蜱和噻虫嗪对E. lanigerum的效果相似，在200 μg/mL剂量下21天后达到89.5%的控制率。我们还通过测定三种杀虫剂解毒酶的活性研究了E. lanigerum 中目标化合物的水解和代谢。复合物20g50 μg/mL 对羧酸酯酶的抑制作用类似于已知的抑制剂磷酸三苯酯。上述结果证明了这些甾体恶唑衍生物作为新型农药开发的潜力。

更新日期：2021-10-06

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11