NEW MATERIAL:A benzoylurea derivative expressed by formula I (R is F or H; X is O or S then R is F and S when R is H).
EXAMPLE: N-2,4,6-trifluorobenzoyl-N'-[2-fluoro-4-(1,1,2,2-tetrafluoroethoxy) phenyl]urea.
USE: Useful as an insecticide and capable of exhibiting remarkable effects on various insect pests, such as the orders Lepidoptera, Diptera, Dictyoptera, Coleoptera and Hymenoptera, especially on larvae, nymphs and eggs thereof.
PREPARATION: A benzoyl isocyanate or isothiocyanate compound expressed by formula II is reacted with an aniline compound expressed by formula III in an inert solvent, such as benzene, normally at ambient temperature W60°C to provide the aimed compound expressed by formula I. As an alternative method, a compound expressed by formula IV is reacted with a compound expressed by formula V to afford the aimed compound expressed by formula I.
OSUMI TADASHI
MORI TATSUYA
YANO TOSHIHIKO
FUJIMOTO IZUMI
SHONO YOSHINORI
