| 摘要 |
NEW MATERIAL:N-(2-Chlorobenzoyl)-N'-(3,5-dichlorophenyl)urea. USE:An insecticide having very high insecticidal activity against Plutella xylostella Linnaeus and armyworm, etc. PREPARATION:2-Chlorobenzoyl isocyanate is reacted with 3,5-dichloroaniline to give N-(2-chlorobenzoyl)-N'-(3,5-dichlorophenyl)urea. The reaction can be carried out if necessary in the presence of a solvent, e.g. benzene, toluene or xylene, within a relatively wide reaction temperature range, preferably within 0-150 deg.C range in general. The aimed substance can be obtained in high yield at about 10min-5hr reaction time.
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