1-[(6-Chloro-3-pyridinyl) methyl]-2-imidazolidine (1), the N-desnitro metabolite of the major insecticide imidacloprid, is known to have similar potency to that of (-)-nicotine as an inhibitor of [3H](-)-nicotine binding at the rat recombinant α4β2 neuronal nicotinic acetylcholine receptor (nAChR); IC50 values in the present study are 3.8 nM for (-)-nicotine, 6.0 nM for 1, and 155 nM for imidacloprid. Synthesis of new analogues of 1, modified only ...
