Patent ID: 7012041

Claim:
A phenylpyridazinone of the formula (I) wherein R 1 represents fluorine, chlorine or bromine, R 2 represents cyano, carbamoyl, thiocarbamoyl, fluorine, chlorine or bromine or represents respectively optionally fluorine- and/or chlorine-substituted alkyl, alkoxy or alkylthio having in each case 1 or 2 carbon atoms, R 3 represents the grouping -A 1 -A 2 -A 3 in which A 1 represents a single bond, represents oxygen, sulphur, —SO—, —SO 2 —, or —CO—, A 1 furthermore represents respectively optionally fluorine-, chlorine- or bromine-substituted C 1 –C 6 -alkanediyl, C 2 –C 6 -alkenediyl, C 2 –C 6 -azaalkanediyl, C 2 –C 6 -alkinediyl, or phenylene, A 2 represents a single bond, represents oxygen, sulphur, —SO—, —SO 2 —, or —CO—, A 2 furthermore represents respectively optionally fluorine-, chlorine- or bromine-substituted C 1 –C 6 -alkanediyl, C 2 –C 6 -alkenediyl, C 2 –C 6 -azaalkanediyl, C 2 –C 6 -alkinediyl, or phenylene, A 3 represents hydrogen, with the proviso that in this case A 1 and/or A 2 do not represent a single bond, A 3 represents hydroxyl, amino, cyano, isocyano, thiocyanato, nitro, carboxy, carbamoyl, thiocarbamoyl, sulpho, chlorosulphonyl, fluorine, chlorine or bromine, A 3 represents respectively optionally fluorine-, chlorine- or C 1 –C 4 -alkoxy-substituted alkyl, alkoxy, alkylthio, alkylsuphinyl, alkylsulphonyl, alkylamino, dialkylamino, alkoxycarbonyl or dialkoxy(thio)phosphoryl having in each case 1 to 6 carbon atoms in the alkyl groups, A 3 represents respectively optionally fluorine- or chlorine-substituted alkenyl, alkenyloxy, alkenylamino, alkylideneamino, alkenyloxycarbonyl, alkinyl, alkinyloxy, alkinylamino or alkinyloxycarbonyl having in each case 2 to 6 carbon atoms in the alkenyl, alkylidene or alkinyl groups, A 3 represents respectively optionally nitro-, cyano-, carboxy-, fluorine-, chlorine-, bromine-, C 1 –C 4 -alkyl-, C 1 –C 4 -halogenoalkyl-, C 1 –C 4 -alkyloxy-, C 1 –C 4 -halogenoalkyloxy- and/or C 1 –C 4 -alkoxy-carbonyl-substituted phenyl, phenyloxy, phenyl-C 1 –C 4 -alkyl, phenyl-C 1 –C 4 -alkoxy, phenyl-oxycarbonyl or phenyl-C 1 –C 4 -alkoxycarbonyl, wherein at least one of R 1 , R 2 and R 3 is not fluorine, chlorine or bromine; R 4 , R 5 and R 6 are identical or different and each represents hydrogen, cyano, thiocarbamoyl, nitro, hydroxyl, mercapto, amino, fluorine, chlorine, bromine or represent respectively optionally fluorine- and/or chlorine-substituted alkyl, alkoxy, alkylthio, alkylamino or dialkylamino having in each case 1 to 4 carbon atoms in the alkyl groups, except for the compound 4-chloro-5-dimethylamino-2-(4-chloro-2-fluoro-5-propargyloxyphenyl)-pyridazin-3-one.