| 摘要 |
A process for preparing aromatic urea derivs. of formula (I) comprises (a) reacting benzoyl halide of formula (II) with NH4OH; (b) reacting the obtd. benzamide with an halogenating agent to obtain N-halogenated benzamide of formula (III); and (c) reacting (III) with arylamine of formula (IV) and a base at 25-100 deg.C for 1-4 hr(s) in an organic solvent. In the formulas, A=Cl or Br; m = 0-2. Pref. the base is KOH or NaOH; and the organic solvent is diethylether, acetone, methyl ethyl ketone, chloroform, dichloromethane or benzene.
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