Divalent and Oxabridged Neonicotinoids Constructed by Dialdehydes and Nitromethylene Analogues of Imidacloprid: Design, Synthesis, Crystal Structure, and Insecticidal Activities

详细信息    查看全文

• 作者：Xusheng Shao ; Hua Fu ; Xiaoyong Xu ; Xinglei Xu ; Zewen Liu ; Zhong Li ; Xuhong Qian
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2010
• 出版时间：March 10, 2010
• 年：2010
• 卷：58
• 期：5
• 页码：2696-2702
• 全文大小：827K
• 年卷期：v.58,no.5(March 10, 2010)
• ISSN：1520-5118

文摘

A series of divalent and oxabridged neonicotinoids were synthesized by reactions of nitromethylene analogues of imidacloprid and dialdehydes, and their structures were confirmed by ¹H NMR, ¹³C NMR, high-resolution mass spectroscopy, and X-ray diffraction analysis. The bioassays indicated that some of them were endowed with excellent insecticidal activities against cowpea aphid (Aphis craccivora), armyworm (Pseudaletia separata Walker), and brown planthopper (Nilaparvata lugens). Divalent neonicotinoid 6 and oxabridged 8a had higher activities than imidacloprid against cowpea aphids and armyworm; furthermore, the activity of 8a was 40.4-fold higher than that of imidacloprid against imidacloprid-resistant brown planthopper.