Study on Synthesis of Insecticide Novaluron One Kind of Benzoylureas

2,6-Difluorobenzoyl isocyanate was synthesized from 2,6-difluorobenzamide and oxalyl dichloride by chlorination reaction,afterwards the addition reaction with 3-chloro-4-[1,1,2-trifluoro-2-(trifluoromethoxy)-ethoxy]aniline was conducted to synthesize insecticide Novaluron.The overall yield was 79.5%. The pure degree was 98.0%.