Design, Synthesis, and Insecticidal Activities of Novel Analogues of Neonicotinoids: Replacement of Nitromethylene with Nitroconjugated System
作者:Xusheng Shao、Zhong Li、Xuhong Qian、Xiaoyong Xu
DOI:10.1021/jf803305f
日期:2009.2.11
To replace nitromethylene pharmacophore with a nitroconjugated system, a series of novelneonicotinoid analogues bearing five-membered aromatic heterocycles were designed and synthesized. Bioassays indicated that some of the synthesized compounds exhibited higher insecticidal activities than imidacloprid against cowpea aphids (Aphis craccivora), armyworm (Pseudaletia separate Walker), Nephotettix bipunctatus
Synthesis, crystal structure, and biological evaluation of a novel eight-membered dinitration neonicotinoid analogues
作者:Xiao Zhang、Weiwei Yu、Xiaoyong Xu、Xusheng Shao、Zhong Li
DOI:10.1016/j.bmcl.2021.127960
日期:2021.7
intermediate synthesis, a serendipitous reaction of introducing nitro group from nitromethylene has been observed. Instead of expected dihydroxy compounds, dinitration structures with nitromethylene analogues were prepared under mild conditions by using a metal-free catalyst B(OH)3. In this reaction, the extra nitro group was suggested to be from starting material. Bioassays indicated that compound 3a showed