Patent ID: 6939888

Claim:
A 1-H-3-aryl-pyrrolidine-2,4-dione of the formula (I) in which A, B and the carbon atom to which they are bonded represent a saturated or unsaturated C6-spirocycle which is optionally monsubstituted or polysubstituted by C 1 -C 6 -alkyl, C 3 -C 8 -cycloalkyl, C 1 -C 3 -halogenoalkyl, C 1 -C 8 -alkoxy, C 1 -C 6 -thioalkyl, fluorine, chlorine or phenyl, or A, B and the carbon atom to which they are bonded represent a C6-spirocycle which is substituted by an alkylenediyl group which together with the carbon atom to which it is bonded forms a further five- to seven-membered spirocycle, or A, B and the carbon atom to which they are bonded represent a C6-spirocycle in which two adjacent substituents together represent a saturated or unsaturated five- or six-membered cycle which is substituted by C1-C 3 -alkyl, C1-C3-alkoxy, fluorine, chlorine or bromine, X represents halogen or C 1 -C 4 -alkoxy, Y represents hydrogen, halogen or C 1 -C 4 -alkoxy, Z represents hydrogen or C 1 -C 4 -alkoxy, wherein at least one of X or Y is halogen; one of X, Y or Z is C 1 -C 4 alkoxy; and one of Y or Z is hydrogen; with the proviso that X and Y or X and Z do not simultaneously represent halogen, G represents hydrogen.