2-phenylhexahydro-1,2,4-triazine-3-,5-diones

Claim 1

A compund of the formula I ##STR53## in which: n is one, two or three and the individual substituents R 1 , independently of one another, each is (a) hydrogen, F, Cl, Br, I, trifluoromethyl, alkyl having 1 to 6 carbon atoms, cycloalkyl having 3 to 6 carbon atoms, alkoxy, alkylthio, alkylsulfinyl or alkylsulfonyl, each having 1 to 6 carbon atoms in the alkyl radical, benzylthio, benzylsulfinyl or benzylsulfonyl, nitro, cyano, amino, alkylamino or dialkylamino, each having 1 to 12 carbon atoms in the alkyl radical, acylamino having 1 to 6 carbon atoms in the acyl radical, or (b) a phenoxy, phenylthio, phenylsulfinyl, phenylsulfonyl, benzoyl, benzoylamino or anilino radical, each of which is substituted once, twice or three times by one of the substituents mentioned under (a); R 2 is hydrogen, straight-chain or branched alkyl having 1 to 12 carbon atoms, cycloalkyl having 3 to 7 carbon atoms, benzyl which is unsubstituted or substituted by F, Cl, Br or (C 1 -C 4 )-alkyl, straight-chain or branched alkanoyl which has 1 to 12 carbon atoms and is unsubstituted or substituted once, twice or three times by F, Cl, Br, or benzoyl which is unsubstituted or substituted once or twice by F, Cl, Br or (C 1 -C 4 )-alkyl; R 3 is hydrogen, straight-chain or branched alkyl having 1 to 12 carbon atoms, cycloalkyl having 3 to 7 carbon atoms, or benzyl which is unsubstituted or substituted by F, Cl, Br or (C 1 -C 4 )-alkyl, with the proviso that at least one of the radicals R 2 and R 3 is not hydrogen, and their salts.