HYDROXYPYRIDONECARBOXAMIDES, THEIR PREPARATION AND USE

摘要

Hydroxypyridonecarboxamides of the formula I <IMG> (I) where the substituents have the following meanings: X is oxygen or sulfur; R1 is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl or phenyl, it being possible for the organic groups to be substituted; R2 is hydrogen, hydroxyl, alkoxy, alkenyloxy, dialkylamino, alkyl, alkenyl, alkynyl or cycloalkyl, it being possible for the organic groups to be substituted; or R1 and R2 together are an alkylene chain having 4 to 7 members, which can be interrupted by oxygen, sulfur or N-methyl; R3 is hydrogen, halogen, nitro, alkyl, alkenyl, alkynyl, cycloalkyl, arylalkyl, alkoxy, haloalkoxy, alkylthio, haloalkylthio, dialkylamino, phenyl, phenylthio, phenoxy or a 5- or 6-membered heterocyclic, aliphatic or aromatic radical containing one to three heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen, said aromatic or heteroaromatic radicals being unsubstituted or substituted, are described.