Showing papers on "Benzoylurea published in 1982"

Substituted N-aroyl N'-phenyl urea compounds

Abstract: Novel N-aroyl N'-phenyl ureas having halogen substituents in the 3- and 5-positions and haloalkyl, haloalkoxy or haloalkylthio in the 4-position of the N'-phenyl are more active and have a broader spectrum of effectiveness than the known benzoylurea insecticides.

Benzoylurea derivative and insecticide containing said derivative as active component

Abstract: NEW MATERIAL:The benzoylurea derivative of formulaI(X, Y and Z are halogen) EXAMPLE:N-(2,6-Difluorobenzoyl)-N'-(2,6-dichloro-3-pyridyl)urea USE:Insecticide inhibiting the synthesis of chitin which forms the outer hard integument of insect, and esp effective for the control of lepidosteron vermins such as rice stem borer, common cutworm, armyworm, common cabbageworm, citrus leaf miner, etc Applied pref at 100-200ppm concentration PROCESS:The compound of formulaIcan be prepared, eg by reacting the benzoyl isocyanate derivative of formula II with the 3-aminopyridine derivative of formula III in a solvent such as ethyl acetate at room temperature

Benzoylurea derivative and insecticide comprising it as active ingredient

Abstract: NEW MATERIAL:A compound shown by the formulaI(X is halogen; X is halogen, HiY is H, halogen, alkyl, aryl, haloalkyl, alkoxy, haloalkoxyl, nitro, cyano, etc.; n is 1-5). EXAMPLE:N-[4-(3-Chlorophenylazo)phenyl]-N'-(2,6-difluorobenzoyl)urea. USE:An insecticide. Effective especially against noxious insects of Lipidoptera such as chilo suppressalis Walker, leucanis separata Walker, malacosma neustria testacea Motshulsky, etc. Inhibiting the synthesis of chitin of insects. PROCESS:A compound shown by the formula II is reacted with a 4-aminoazobenzene shown by the formulaIIIin a solvent such as ethyl acetate, acetonitrile, benzene, etc. at 0-50 deg.C, to give a compound shown by the formulaI.