Patent ID: 8242055

Claim:
A 4-phenylpyridazinone of formula (I) or a salt thereof in which A and B are in each case independently of one another hydrogen or (C 1 -C 6 )-alkyl; G is hydrogen, C(═O)R 1 , C(=L)MR 2 , SO 2 R 3 , P(=L)R 4 R 5 , C(=L)NR 6 R 7 or E; E is a metal ion equivalent or an ammonium ion; L is oxygen or sulfur; M is oxygen or sulfur; R 1 is (C 1 -C 6 )-alkyl, (C 2 -C 6 )-alkenyl, (C 1 -C 4 )-alkoxy-(C 1 -C 6 )-alkyl, di-(C 1 -C 4 )-alkoxy-(C 1 -C 6 )-alkyl or (C 1 -C 4 )-alkylthio-(C 1 -C 6 )-alkyl, each of which is substituted by n halogen atoms, a fully saturated 3- to 6-membered ring comprising 3 to 5 carbon atoms and 1 to 3 heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen which is substituted by n radicals from the group consisting of halogen, (C 1 -C 4 )-alkyl and (C 1 -C 4 )-alkoxy, (C 3 -C 6 )-cycloalkyl, phenyl, phenyl-(C 1 -C 4 )-alkyl, heteroaryl, phenoxy-(C 1 -C 4 )-alkyl or heteroaryloxy-(C 1 -C 4 )-alkyl substituted by n radicals selected from the group consisting of halogen, (C 1 -C 4 )-alkyl and (C 1 -C 4 )-alkoxy; R 2 is (C 1 -C 6 )-alkyl, (C 2 -C 6 )-alkenyl, (C 1 -C 4 )-alkoxy-(C 1 -C 6 )-alkyl or di-(C 1 -C 4 )-alkoxy-(C 1 -C 6 )-alkyl, each of which is substituted by n halogen atoms, or is (C 3 -C 6 )-cycloalkyl, phenyl or benzyl, each of which is substituted by n radicals selected from the group consisting of halogen, (C 1 -C 4 )-alkyl and (C 1 -C 4 )-alkoxy; R 3 , R 4 and R 5 are each independently of one another (C 1 -C 6 )-alkyl which is substituted by n halogen atoms, (C 1 -C 4 )-alkoxy, N—(C 1 -C 6 )-alkylamino, N,N-di-(C 1 -C 6 )-alkylamino, (C 1 -C 4 )-alkylthio, (C 2 -C 4 )-alkenyl or (C 3 -C 6 )-cycloalkylthio, or phenyl, benzyl, phenoxy or phenylthio which is substituted by n radicals selected from the group consisting of halogen, (C 1 -C 4 )-alkyl and (C 1 -C 4 )-alkoxy; R 6 and R 7 are each independently of one another hydrogen, (C 1 -C 6 )-alkyl which is substituted by n halogen atoms, (C 3 -C 6 )-cycloalkyl, (C 2 -C 6 )-alkenyl, (C 1 -C 6 )-alkoxy or (C 1 -C 4 )-alkoxy-(C 1 -C 6 )-alkyl, phenyl or benzyl, each of which is substituted by n radicals selected from the group consisting of halogen, (C 1 -C 4 )-alkyl and (C 1 -C 4 )-alkoxy; or R 6 and R 7 together with the nitrogen atom to which they are attached form a 3- to 6-membered ring which contains 2 to 5 carbon atoms and 0 or 1 oxygen or sulfur atoms; m is 1, 2 or 3; n is 0, 1, 2 or 3; X is halogen, cyano, (C 3 -C 6 )-cycloalkyl, nitro or is (C 1 -C 6 )-alkyl or (C 1 -C 6 )-alkoxy, each of which is substituted by m halogen atoms or phenyl substituted by n halogen atoms; Y and Z are each independently of one another hydrogen, halogen, cyano, nitro, (C 3 -C 6 )-cycloalkyl or are (C 1 -C 6 )-alkyl, (C 1 -C 6 )-alkoxy or phenyl, each of which is substituted by n halogen atoms, with the proviso that neither Y nor Z is a (C 1 -C 6 )-alkyl or (C 1 -C 6 )-alkoxy radical located in position 6 if n is 0; with the proviso that the compound is not: 4(2,4-dichlorophenyl)-5-hydroxy-2-methylpyridazin-3(2H)-one.