Insecticidal and Neuroblocking Potencies of Variants of the Imidazolidine Moiety of Imidacloprid-Related Neonicotinoids and the Relationship to Partition Coefficient and Charge Density on the Pharmacophore
The pharmacophore of the neonicotinoid insecticide imidacloprid, nitroiminoimidazolidine, was modified to heterocycles such as thiazolidine, pyrrolidine, dihydroimidazole, dihydrothiazole, and pyridone conjugated to nitroimine (=NNO2) or nitromethylene (=CHNO2). Their 6-chloro-3-pyridylmethyl or 5-chloro-3-thiazolylmethyl derivatives were examined for insecticidal activity against the American cockroach