To search for novel 2-arylpyrroles with unique biological activities, a series of novel 2-arylpyrrole derivatives were designed and synthesized, and their structures were characterized by 1H and 13C NMR spectroscopy, MS spectrometry, and elemental analysis. Their insecticidal activities against Lepidopteran pests (e.g. Mythimna separata) and acaricidal activities against mites (e.g. Tetranychus urticae) were evaluated. The results of bioassays indicate that some of these title compounds exhibited excellent insecticidal and acaricidal activities. For example, 4-bromo-1-((chloromethoxy)methyl)-2-(4-chloro phenyl)-5-(trifluoromethyl)pyrrole-3-carbonitrile (6a), 4-bromo-2-(4-chlorophenyl)-1-((2-fluoroethoxy)-methyl)-5-(trifluoromethyl)pyrrole-3-carbonitrile (6d) showed insecticidal activity against Mythimna separata and 4-bromo-2-(4-chlorophenyl)-1-((isopropoxymethoxy)methyl)-5-(trifluoro methyl)pyrrole-3-carbonitrile (7d) showed acaricidal activity against Tetranychus urticae. They were more effective than Chlorfenapyr, which has been the only commercialized member of a new class of chemicals of 2-arylpyrroles.
为了寻找具有独特
生物活性的新型2-芳基
吡咯,设计并合成了一系列新型2-芳基
吡咯衍
生物,并通过1H和13C NMR波谱、MS波谱和元素分析对其结构进行了表征。评估了它们对鳞翅目害虫(如粘虫)的杀虫活性和对螨类(如二斑叶螨)的杀螨活性。
生物测定结果表明,这些化合物中的一些具有优异的杀虫和杀螨活性。例如,4-
溴-1-((
氯甲氧基)甲基)-2-(4-
氯苯基)-5-(三
氟甲基)
吡咯-3-腈(6a),4-
溴-2-(4-
氯苯基)-1-((2-
氟乙氧基)甲基)-5-(三
氟甲基)
吡咯-3-腈(6d)表现出对粘虫的杀虫活性,而4-
溴-2-(4-
氯苯基)-1-((异丙氧甲氧基)甲基)-5-(三
氟甲基)
吡咯-3-腈(7d)表现出对二斑叶螨的杀螨活性。它们的活性均优于
氯芬普司,后者是唯一已商业化的2-芳基
吡咯类新
化学品成员。