| 摘要 |
Urea deriv. of formula (I) is prepd. by reacting alkylphenyl carbamate of formula (VI) with amine derive of formula (II) in the presence of a catalyst and solvent. In the formulas, X is Cl, Br, F or I; R is C3-8 cycloalkyl; R' is C1-5 alkyl, phenyl or 4nitrophenyl. Pref. the catalyst is selected from aluminium halide, boron halide, Fe halide, Ti halide, Zn halide, alkyl aluminium, alkyl boron, alkoxy boron, alkoxy titanium or aluminium oxide. (I) is useful for pellicularia sasakii or pellicularia filamentosa, etc, of the rice plant.
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