7-(1-PYRROLIDINYL)-3-QUINOLONE-AND -NAPHTHYRIDONE-CARBOXYLIC ACID DERIVATIVES, PROCESS FOR THEIR PREPARATION AND SUBSTITUTED MONO-AND BICYCLIC PYRROLIDINE DERIVATIVES AS INTERMEDIATE PRODUCTS FOR THEIR PREPARATION, AND ANTIBACTERIAL AND FEED ADDITIVES CONTAINING THEM

摘要

The invention relates to 3-quinolone- and-naphthyridonecarboxylic acid derivatives of the formula (I)(see fig. I)in which typical values of X1, X2, R1, R2, R3 and Ainclude halogen, hydrogen, alkyl, nitrogen-containinghetercocycle and CH or N, respectively. Processes andintermdiates for their preparation and antibacterialcompositions and feed additives containing them are alsodisclosed.