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合成拟除虫菊酯类杀虫剂,由于杀虫活性高而且低毒,故具有很好的发展前景。通过2-溴-3-甲基丁酸与对位被氟、氯、溴、甲氧基和三氟甲基取代的苯酚反应制得了不同取代基的3-甲基-2-苯氧基丁酸。这些酸的酰氯与五氟苄醇反应制得了拟除虫菊酯。这5个拟除虫菊酯中,有4个化合物,即酸部分的苯环上分别取代有氟、氯、溴和甲氧基的化合物(Ⅰ、Ⅱ、Ⅲ、Ⅳ)对五带淡色库蚊有效,对其幼虫的LC_(50)为0.338～0.997毫克/升,对成虫的LD_(50)
Pyrethroid synthetic pyrethroid insecticides, due to high insecticidal activity and low toxicity, it has good prospects for development. By substituting 2-bromo-3-methylbutyric acid with a phenol substituted at the para position by fluorine, chlorine, bromine, methoxy and trifluoromethyl, 3-methyl-2-phenoxybutyl acid. The acid chlorides are reacted with pentafluorobenzyl alcohol to prepare pyrethroids. Of the five pyrethroids, four compounds, ie compounds (I, II, III, IV) substituted on the benzene ring of the acid moiety by fluorine, chlorine, bromine and methoxy groups, respectively, were effective against Culex pipiens pallens , And the LC 50 of its larvae was 0.338-0.997 mg /