Abstract:
2-Oxyamino alkylidene-cyclohexane-1,3-dione derivs. of formula (I) are prepd. by reacting a cpd. of formula (II) with a substd. alkoxy amine or its acid addn. salt of formula H2N-OR4. In the formulas, R and R1 are each H, C1-3 lower alkoxy, OH, acetoxy or halogen; R2 is H; R3 is C2-3 alkyl or alkenyl; R4 is C1-3 lower alkyl or alkenyl. (I) have a good herbicidal effect.