Synthesis, Crystal Structure and Insecticidal Activity of the Optical Active Neonicotinoid Analogues.

Eight novel neonicotinoid analogues 1-(2-tetrahydrofurfuryl)-5-substituted-1,3,5-hexahydrotriazine-2-N-nitroimines 3a–3h were synthesized, and their structures were characterized by 1H NMR, IR and elemental analysis. The stereostructure of 3a was determined by the single-crystal X-ray analysis, which exhibits a half-chair conformation and dihedral angle is 49.70°. The preliminary bioassay tests showed that all the title compounds exhibited good insecticide activities against Nilaparvata legen (N. legen).