| 摘要 |
2,3-substituted 1,8-naphthyridines of the general formula I <IMAGE> I where: R is hydrogen or C1-C4-alkyl (n=1 or 2) R1 is amino or substituted amino, XR5, where X is oxygen or sulfur and R5 is hydrogen, C1-C12-alkyl, C1-C4-alkoxycarbonyl-((C1-C4)-alkyl, C5-C8-cycloakyl, substituted or unsubstituted phenyl, substituted or unsubstituted phenyl-(C1-C3)-alkyl, halogen, isothiorhonium halide, C1-C12-alkyl, C1-C4-alkoxycarbonyl-C1-C4-alkyl, substituted or unsubstituted phenyl or phenyl-(C1-C3)-alkyl, R2 is C1-C4-alkyl, cyano, carboxyl or a group <IMAGE> where X is oxygen or sulfur, B is C1-C6-alkyl, C1-C6-alkoxy or alkylthio, amino, mono- or dialkylamino, where each alkyl radical is of 1 to 4 carbon atoms, morpholino, piperidyl, chlorine, bromine or substituted or unsubstituted phenyl, D is C1-C4alkyl or NH2 and R6 is hydrogen, C1-C8-alkyl or alkylcarbonyl, or R1 and R2 together are -NH-N=C(CH2)-, and their environmentally tolerated salts with the proviso that R2 is not cyano, carboxyl or a carboxamido or carboxylic ester group when R1 is methyl, hydroxyl or amino (NH2), processes for their manufacture, and herbicidal agents containing a naphthyridine I as safener and at least one herbicidal active ingredient selected from the group consisting of a) 2-(4-heteroaryloxy)- or 2-(4-aryloxy)-phenoxyacetic acid derivatives and b) cyclohexenone derivatives.
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