Insecticide synergists are an effective approach to increase the control efficacy and reduce active ingredient usage. In order to explore neonicotinoid-specific synergists with novel scaffolds and higher potency, a series of eight-membered carbon bridged neonicotinoidderivatives were designed and synthesized in accordance with our previous research. The synergistic effects of the target compounds
杀虫增效剂是提高防治效果和减少活性成分使用量的有效方法。为了探索具有新颖支架和更高效力的新烟碱类特异性增效剂,根据我们前期的研究,设计并合成了一系列八元碳桥新烟碱类衍生物。评价了目标化合物对蚜虫新烟碱类杀虫剂的协同作用,并总结了构效关系。结果表明,大多数目标化合物在低浓度下对羊螈中的吡虫啉表现出显着的协同作用。特别地,浓度为1mg/L的化合物1将吡虫啉的LC 50值从0.856mg/L降低至0.170mg/L。同时,化合物1还提高了属于杀虫剂抗性行动委员会 (IRAC) 4 A 亚组的大多数新烟碱类杀虫剂对A. craccivora 的杀虫活性。本研究对于指导新烟碱类特异性增效剂的设计可能有意义。
Binding activity of substituted benzyl derivatives of chloronicotinyl insecticides to housefly-head membranes, and its relationship to insecticidal activity against the houseflyMusca domestica
作者:Hisashi Nishiwaki、Yoshiaki Nakagawa、David Y Takeda、Atsushi Okazawa、Miki Akamatsu、Hisashi Miyagawa、Tamio Ueno、Keiichiro Nishimura
Variously substituted benzyl derivatives of chloronicotinyl insecticides were synthesized with a wide range of substituents including halogens, NO2, CN, CF, and small alkyl and alkoxy groups at the ortho, meta and para positions, as well as multiple-substituted benzyl analogues. Their binding activity to the alpha-bungarotoxin binding site in housefly (Musca domestica) head membrane preparations was measured. Among the compounds tested, the activity of the meta-CN derivative was the highest, being 20-100 times higher than those of imidacloprid, acetamiprid and nitenpyram. The synergized insecticidal activity against houseflies was also measured for selected compounds with the metabolic inhibitor, NIA16388 (propargyl propyl phenylphosphonate). For the nitromethylene analogues, including both benzyl and pyridylmethyl analogues, higher binding activity usually resulted in higher insecticidal activity. (C) 2000 Society of Chemical Industry.
Design, Synthesis, and Synergistic Activity of Eight-Membered Oxabridge Neonicotinoid Analogues
作者:Xiao Zhang、Yiping Wang、Zhiping Xu、Xusheng Shao、Zewen Liu、Xiaoyong Xu、Peter Maienfisch、Zhong Li
DOI:10.1021/acs.jafc.0c04786
日期:2021.3.17
cis-configuration neonicotinoid (IPPA08) exhibited specific synergistic activity toward neonicotinoid insecticides. In this study, we synthesized a series of structural analogues of IPPA08 by converting the pyridyl moiety of IPPA08 into phenyl groups, via facile double-Mannich condensation reactions between nitromethylenecompounds and glutaraldehyde. All of the oxabridged neonicotinoidcompounds were found