| 摘要 |
Title compds. (I; R1 = alkyl, alkoxy, alkyl amino ; R2 = alkyl, cycloalkyl, substituted phenyl ; R3 = H, alkyl, alkenyl ; R4 = OH-, alkoxy, alkylthio, amino, alkylamino, dialkylamino), useful as herbicide, were prepd. by reaction of 4-amino-1,2,-4-triazine-5-on(II) with glyoxalic acid or its derivs.(II) and alcohol (IV) (when R3 isn't H in I) in the presence of thickener such as benzene, xylene, toluene, dioxane, THF, and chlorinated hydrocarbone ester.
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