In an attempt to search for natural product-based insecticidal agents, a series of novel dehydroabietic acid derivatives bearing 1,3,4-thiadiazole moiety were designed and synthesized. Their structures were characterized by IR, MS, ¹H-NMR, ¹³C-NMR, and elemental analysis. The insecticidal activities against cotton bollworm (Helicoverpa armigera), corn borer (Ostrinia nubilalis Hübner), and diamondback moth (Plutella xylostella (L.)) were evaluated. The bioassay test showed that some of the target compounds exhibited excellent insecticidal activities at the concentration of 200 µg/ml; compound 3a had the best mortality rate of 90.0 and 80.0 % against H. armigera and O. nubilalis Hübner, respectively.

中文翻译：

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N-（5-脱氢松香基-1,3,4-噻二唑-2-基）-苯磺酰胺的合成及杀虫活性

为了寻找基于天然产物的杀虫剂，设计并合成了一系列带有1,3,4-噻二唑部分的新型脱氢松香酸衍生物。它们的结构通过IR，MS，¹ H-NMR，¹³ C-NMR和元素分析来表征。评估了棉铃虫（Helicoverpa armigera），玉米bore（Ostrinia nubilalisHübner）和小菜蛾（Plutella xylostella（L。））的杀虫活性。生物测定测试表明，某些目标化合物在200 µg / ml的浓度下表现出优异的杀虫活性。化合物3a对棉铃虫的最佳死亡率为90.0和80.0％和O. nubilalisHübner。