- Synthesis method of insecticide teflubenzuron and intermediate 2,6-difluorobenzamide of insecticide teflubenzuron
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The invention discloses a synthesis method of an insecticide teflubenzuron and an intermediate 2,6-difluorobenzamide of the insecticide teflubenzuron, belonging to the field of pesticides. The synthesis method comprises the following steps: step 1, preparation of 2,6-dichlorobenzylidene chloride: preparing turbid liquid of dichlorotoluene and phosphorus pentachloride, introducing chlorine gas, layering materials by utilizing a gas-liquid separator, collecting a crude product, and rectifying the crude product to obtain the 2,6-dichlorobenzylidene chloride; and 2, preparation of 2,6-dichlorobenzonitrile: mixing 2,6-dichlorobenzylidene chloride, acetic acid, zinc chloride, hydroxylamine hydrochloride and sodium acetate, carrying out heating for a reflux reaction, conducting cooling, stirring,filtering and drying successively after the reaction is completed so as to obtain 2, 6-dichlorobenzonitrile. By adopting a one-pot method, a reaction route is shortened, total yield is increased to 67.3% from conventional 55.4%, and cost is greatly reduced.
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- Method for exterminating termites
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A method for exterminating termites comprising using an entomopathogenic nematode together with an inset-growth regulator or a slow-acting insecticide, wherein insecticidal effects are reinforced compared with the cases using singly the entomopathogenic nematode and the insect-growth regulator or the slow-acting insecticide, respectively, and a bait station for exterminating termites that contains an entomopathogenic nematode with an insect-growth regulator or a slow-acting insecticide. According to the invention, emission of harmful chemicals to environment can be suppressed. The invention is nonpoisonous for human being and livestock, and is useful for indoor or outdoor extermination of termites.
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- Method for the preparation of insecticidal benzoylurea compounds
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The present invention provides an improved method for the preparation of an insecticidal benzoylurea having the structural formula I STR1
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- Use of acyl urea compounds for controlling endoparasites and ectoparasites of warm-blooded animals
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A method of systemically controlling endoparasites and ectoparasites of warm-blooded animals by orally or percutaneously administering to the animal a parasiticidally effective amount of an acyl urea compound.
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- Process for the preparation of benzoyl ureas
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Benzoyl ureas of the formula STR1 are prepared by starting from benzoyl derivatives of the formula which are converted via the corresponding azides into the isocyanates, which are in turn reacted with corresponding benzamides.
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- Urea derivatives and pesticidal compositions containing same
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This invention relates to compounds of the formula STR1 Z' is chlorine or fluorine, with the proviso that Z' is chlorine when Q is the moiety of Formula III. The invention also relates to the preparation of the compounds, their use in controlling animal pests in plant protection, and pesticidal agents comprising the compounds as active ingredients.
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- N-(2H-Difluoro-3,5-dichloro-phenyl)-N'-(2,6-difluorobenzoyl) urea derivative and pesticidal compositions containing same
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This invention relates to compounds of the formula STR1 wherein STR2 X is oxygen or sulfur; Y is chlorine or fluorine; and Z is hydrogen, chlorine, or fluorine, as well as to the preparation thereof, their use in controlling animal pests in plant protection, and pesticidal agents comprising the compounds of Formula I as active ingredients.
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