7-(1-pyrrolidinyl)-3-quinolone- and -naphthyridonecarboxylic acid derivatives as antibacterial agents and feed additives

A 7-(pyrrolidinyl)-3-quinolone- or -naphthyridonecarboxylic acid derivative of the formula ##STR382## in which X.sup.1 represents halogen,

• X.sup.2 represents hydrogen., amino, alkylamino having 1 to 4 carbon atoms,. dialkylamino having 1 to 3 carbon atoms per alkyl group, hydroxyl, alkoxy having 1 to 4 carbon atoms, mercapto, alkylthio having 1 to 4 carbon atoms, arylthio or halogen,
• R.sup.1 represents alkyl having 1 to 4 carbon atoms, alkenyl having 2 to 4 carbon atoms, cycloalkyl having 3 to 6 carbon atoms, 2-hydroxyethyl, 2-fluoroethyl, methoxy amino, methylamino, ethylamino, dimethylamino or phenyl which is optionally substituted by 1 or 2 fluorine atoms,
• R.sup.2 represents hydrogen, alkyl having 1 to 4 carbon atoms or (5-methyl-2-oxo-1,3-dioxol-4-yl)-methyl,
• R.sup.3 represents a radical of the structure ##STR383## wherein R.sup.6 represents H, optionally hydroxyl-substituted C.sub.1 -C.sub.4 -alkyl, as well as phenyl, benzyl, C.sub.1 -C.sub.4 -alkoxycarbonyl, C.sub.1 -C.sub.4 -acyl, (5-methyl-2-oxo-1,3-dioxol-4-yl)-methyl, or C.sub.3 -C.sub.8 -cycloalkyl,
• R' represents H, CH.sub.3 or phenyl,
• R" represents H, CH.sub.3 or phenyl,
• R"' reprseents H or CH.sub.3,
• Y represents O, CH.sub.2 CH.sub.2 CH.sub.2 or CH.sub.2 --O, it being possible for the CH.sub.2 --O group to be linked to the nitrogen either via O or via CH.sub.2, and
• A represents N.or C--R.sup.8, wherein
• R.sup.8 represents H, halogen, methyl, cyano, nitro, hydroxyl or methoxy or, together with R.sup.1, forms a bridge having the structure ##STR384## or an addition product thereof with water, an acid or an alkali.