Substituted 2,4-diamino-1,3,5-triazine as herbicide

A substituted 2,4-diamino-1,3,5-triazine of the formula (I),

• wherein
• R1 represents hydrogen, an unsubstituted alkyl group having 1 to 6 carbon atoms or a cyano-, halogen- or C1-C4-alkoxy-substituted alkyl having 1 to 6 carbon atoms,
• R2 represents formyl;
• an unsubstituted alkylcarbonyl, alkoxycarbonyl or alkylsulphonyl having in each case 1 to 6 carbon atoms in the alkyl group:
• a cyano-, halogen- or C1-C4-alkoxy-substituted alkylcarbonyl, alkoxycarbonyl or alkylsulphonyl having in each case 1 to 6 carbon atoms in the alkyl group;
• an unsubstituted phenylcarbonyl. napthylcarbonyl, phenylsulphonyl or naphthylsulphonyl;
• a cyano-, halogen-, C1-C4-alkyl-, halogeno-C1-C-alkyl-, C1-C,-alkoxy-, halogeno-C1-C4-alkoxy- or C1-C4-alkoxy-carbonyl-substituted phenylcarbonyl, napthylcarbonyl, phenylsulphonyl or naphthylsulphonyl:
• R3 represents an unsubstituted alkyl having 1 to 6 carbon atoms:
• an unsubstituted cycloalkyl having 3 to 6 carbon atoms;
• an hydroxyl-, cyano-, halogen- or C1-C4-alkoxy-substituted alkyl having 1 to 6 carbon atoms;
• a cyano-, halogen- or C1-C4-alkyl-substituted cycloalkyl having 3 to 6 carbon atoms,
• R4 represents hydrogen or an alkyl group having 1 to 4 carbon atoms,
• A represents oxygen or methylene, provided that if Ar represents an optionally substituted phenyl or naphthyl, A cannot represent methylene,
• Ar represents an optionally substituted phenyl, naphthyl or heterocyclyl, where the heterocyclyl radicals are selected from the group consisting of:
• furyl, benzofuryl, dihydrobenzofuryl, tetrahydrofuryl, thienyl, benzothienyl, thiazolyl, benzothiazolyl, oxazolyl, benzoxazolyl, thiadiazolyl, oxadiazolyl, pyrazolyl, pyrrolyl, indolyl, pyridinyl, quinolinyl, isoquinolinyl and pyrimidinyl,
• and wherein the possible substituents are selected from the group consisting of:
• hydroxyl;
• cyano;
• nitro;
• halogen;
• unsubstituted alkyl or alkoxy having in each case 1 to 6 carbon atoms in the alkyl group unsubstituted alkylcarbonyl, alkoxycarbonyl, alkylthio, alkylsulphinyl or alkylsulphonyl having in each case 1 to 6 carbon atoms in the alkyl group;
• an hydroxy-, cyano- or halogen-substituted alkyl or alkoxy having in each case 1 to 6 carbon atoms;
• a halogen-substituted alkylcarbonyl, alkoxycarbonyl, alkylthio, alkylsulphinyl or alkylsulphonyl having in each case 1 to 6 carbon atoms in the alkyl groups;
• an unsubstituted phenyl or phenoxy:
• an hydroxyl-, cyano-, nitro-, halogen-, C1-C4-alkyl, C1-C4-halogenoalkyl-, C1-C4-alkoxy- or C1-C4-halogenoalkoxy-substituted phenyl or phenoxy;
• an unsubstituted methylenedioxy or ethylenedioxy:
• and a halogen-substituted methylenedioxy or ethylenedioxy;
• and
• Z is selected from the group consisting of hydrogen;
• an unsubstituted alkyl, alkylcarbonyl, alkoxycarbonyl, alkylsulphinyl or alkylsulphonyl having in each case 1 to 6 carbon atoms in the alkyl group:
• an hydroxyl-, cyano-, nitro-, halogen-. C1-C4-alkoxy-, C1-C14-alkylcarbonyl-, C1-C4-alkoxycarbonyl-, C1-C4-alkylthio-, C1-C4-alkylsulphinyl- or C1-C4 alkylsulphonyl-substituted alkyl, alkylcarbonyl, alkoxycarbonyl, alkylsulphinyl or alkylsulphonyl having in each case 1 to 6 carbon atoms in the alkyl group;
• and an unsubstituted alkenyl or alkinyl having in each case 2 to 6 carbon atoms;
• and a halogen- or C1-C4-alkoxy-substituted alkenyl or alkinyl having in each case 2 to 6 carbon atoms.