Synthesis and biological activity evaluation of novel β-substituted nitromethylene neonicotinoid analogues

Molecules. 2012 Aug 24;17(9):10014-25. doi: 10.3390/molecules170910014.

Abstract

The structure-based design and synthesis of a series of novel neonicotinoid analogues are described. The novel neonicotinoid analogues were designed based upon the reaction of enamine derivatives with electron-withdrawing β-substituents with electrophilic thiocyanogen reagents. These compounds were characterized by spectroscopic methods. Bioassays indicated that some of the synthesized compounds exhibited excellent bioactivity against cowpea aphids (Aphis craccivora). The LC₅₀ values of compounds 7, 9,12, 13, 15, 17, 19, 20 and commercial imidacloprid were 0.01567, 0.00974, 0.02494, 0.01893, 0.02677, 0.01778, 0.0220, 0.02447 and 0.03502 mmol L⁻¹, respectively, which suggested that they could be used as leads for future development of new insecticides.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anabasine / analogs & derivatives*
  • Anabasine / chemistry
  • Animals
  • Aphids*
  • Imidazoles / chemistry
  • Insecticides / chemical synthesis*
  • Insecticides / chemistry
  • Methane / analogs & derivatives*
  • Methane / chemistry
  • Molecular Structure
  • Neonicotinoids
  • Nitro Compounds / chemistry
  • Nitroparaffins / chemistry*
  • Thiocyanates / chemistry

Substances

  • Imidazoles
  • Insecticides
  • Neonicotinoids
  • Nitro Compounds
  • Nitroparaffins
  • Thiocyanates
  • imidacloprid
  • Anabasine
  • thiocyanate
  • Methane
  • nitromethane