NEW MATERIAL:A compound expressed by formula I (R is halogen; R1 is halo gen or H; X is H, halogen or lower alkyl; n is 0, 1 or 2; R2 is lower alkyl or lower alkenyl; Y is H, halogen, etc.; m is 0, 1, 2 or 3).
EXAMPLE: N-( 2,6-difluorobenzoyl )-N'-[2-fluoro-4-{N'-(4-chlorophenyl)-N'-propylu reido}phenyl]urea.
USE: An insecticide and acaricide, effective against insect pests of the order Lepidoptera and plant parasitic mites with low toxicity to humans, animals, plants and fishes.
PREPARATION: A compound expressed by formula II is reacted with a compound expressed by formula III or a compound expressed by formula IV is reacted with a compound expressed by formula V to afford the aimed compound expressed by formula I. The reaction is carried out in an inert solvent, such as aromatic hydrocarbon or ether, at -10°C W the boiling point of the reaction mixture.
NANJO KATSUMI
KATSURAYAMA TAKAYOSHI
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