A novel class of mesoionic pyrido[1,2-a]pyrimidinones has been discovered with exceptional insecticidal activity controlling a number of insect species. In this communication, we report the part of the optimization program which led to the discovery of triflumezopyrim as a highly potent insecticide controlling various hopper species. Our efforts in discovery, synthesis, structure-activity relationship elucidation, and biological activity evaluation are also presented.
Keywords: Acetylcholine receptor; Inhibitor; Insecticide; Mesoionic; Pyrido[1,2-a]pyrimidinone; Triflumezopyrim.
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