Synthesisandinsecticidalactivitiesofdiamidescontainingmonofluoromethoxygroup

Fifteen novel diamides containing monofluoro methoxy group compounds were synthesized using 2,3-dichloropyridine as the starting material by hydrazinolysis, cyclization, oxidation, substitution, hydrolysis, cyclization and amine hydrolysis. The structures of the title compounds were characterized by ¹H NMR and HRMS. Preliminary bioassay results indicated that all the target compounds showed insecticidal activities. At the concentration of 100 mg/L, all compounds exhibited 100% insecticidal activities against Oriental armyworm. When the concentration was reduced to 4 mg/L, compounds 8a , 8d , 8g , 8k and 8n still exhibited 100% insecticidal activities against O. armyworm.