Benzoxazoles, benzothiazoles and benzimidazoles having substituents on the azole and benzene nuclei were synthesized evaluated for antifungal, insecticidal and herbicidal activities. It was found that benzimidazoles tended to exhibit antifungal activity while benzothiazoles tended to show herbicidal activity. Chloro, trifluoromethyl, methoxy and ethoxy groups at the 5 position were potent substituents, and the 2-pyridyl group at the 2 position is a common structural unit. Among several active derivatives, 7-chloro-2-(2-pyridyl) benzimidazole and 2-(2-pyridyl)-5-trifluoromethylbenzothiazole exhibited significant activity against Panonycus citri.
合成了在偶氮和苯环上具有取代基的苯并
噁唑、
苯并噻唑和
苯并咪唑,并评估其抗真菌、杀虫和除草活性。研究发现,
苯并咪唑倾向于表现出抗真菌活性,而
苯并噻唑则倾向于显示除草活性。在5位位置上的
氯、三
氟甲基、甲氧基和乙氧基基团是有效的取代基,而在2位位置的
吡啶基是一个常见的结构单元。在几种具有活性的衍
生物中,7-
氯-2-(2-
吡啶基)
苯并咪唑和2-(2-
吡啶基)-
5-三氟甲基苯并噻唑对柑
橘红蜘蛛表现出显著活性。