Abstract: The invention relates to cyclopentane- and -pentene-.beta.-amino acids, processes for their preparation and their use as medicaments.

Abstract: 7-(1-Pyrrolidinyl)-3-quinolone- and -naphthyridone-carboxylic acid derivatives as antibacterial agents and feed additives, of the formula ##STR1## in which X.sup.1 is halogen,X.sup.2 is hydrogen, halogen, amino or other radical,R.sup.1 is alkyl, cycloalkyl, optionally substituted phenyl or other radical,R.sup.2 is hydrogen, alkyl or a dioxolylmethyl radical,R.sup.3 is ##STR2## and A is N, CH, C-halogen, or the like, or forms a bridge with R.sup.1,and addition products thereof.

Abstract: The invention relates to new quinolone- and naphthyridonecarboxylic acid derivatives which are substituted in the 7-position by a tricyclic amine radical, their salts, processes for their preparation and antibacterial compositions comprising these compounds.

Abstract: The invention relates to novel derivatives of quinolone-carboxylic acid and naphthyridonecarboxylic acid which are substituted in the 7 position by a 1- (or 5-)amino-methyl-2- (or 3-)oxa-7-aza-bicyclo[3.3.0]oct-7-yl residue, their salts, processes for their preparation and antibacterial agents containing these compounds.

Abstract: The invention is related to 7-amino-1-cyclopropyl-6,8- dihalogeno-1,4-dihydro-4-oxo-3-quinoline-carboxylic acids of the formula (I) ##STR1## in which X.sup.1, X.sup.2, R.sup.1 and R.sup.2 have the meaning as pointed out in the following specification. Moreover, the invention is related to a process for the production of the compounds of formula (I) and to antibacterial agents containing them.

Abstract: The invention relates to novel quinolone derivatives and naphthyridone derivatives which are substituted in the 7-position by a partially hydrogenated isoindolinyl ring, to processes for their preparation and to antibacterial agents and feed additives containing them.

Abstract: The invention relates to novel derivatives of 1-(2-fluorocyclopropyl)-quinolonecarboxylic acid and 1-(2-fluorocyclopropyl)-naphthyridonecarboxylic acid which are substituted in the 7 position by a 2,3,4,5,6,7-hexahydro-1H-pyrrolo[3,4-c]pyridin-2-yl or 1,2,3,4,5,6-hexahydropyrrolo[3,4-c]pyrrol-2-yl residue, to their salts, to a process for their preparation and to antibacterial agents containing these derivatives.

Abstract: Novel bactericidal pyrido[1,2,3-d,e,][1,3,4]benzoxadiazine derivatives of the formula (I) ##STR1## in which R.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl optionally substituted by hydroxyl or halogen,R.sup.2 independently of R.sup.1 is hydrogen or methyl,R.sup.3 is hydrogen or C.sub.1 -C.sub.4 -alkyl,R.sup.4 is hydrogen, C.sub.1 -C.sub.4 -alkyl optionally substituted by hydroxyl, methoxy, amino, methylamino or dimethylamino, or (5-methyl-2-oxo-1,3-dioxol-4-yl)-methyl,X.sup.

Abstract: The invention is related to 7-amino-1-cyclopropyl-6,8-dihalogeno-1,4-dihydro-4-oxo-3-quinoline-carboxy lic acids of the formula (I) ##STR1## in which X.sup.1, X.sup.2, R.sup.1 and R.sup.2 have the meaning as pointed out in the following specification. Moreover, the invention is related to a process for the production of the compounds of formula (I) and to antibacterial agents containing them.

Abstract: The invention relates to new 8-vinyl- and 8-ethinylquinolonecarboxylic acids, process for their preparation, and antibacterial agents and feed additives containing them.

Abstract: An antibacterially active quinolone or naphthyridonecarboxylic acid derivative of the formula ##STR1## in which R.sup.1 stands for various organic radical,R.sup.2 stands for hydrogen, alkyl having 1 to 4 carbon atoms or (5-methyl-2-oxo-1,3-dioxol-4-yl)-methyl,R.sup.3 stands for hydrogen or amino,R.sup.4 stands for a radical of the formula ##STR2## A stands for N or C--R.sup.5, whereinR.sup.5 stands for hydrogen, halogen methyl, cyano or nitro or else together with R.sup.1 can form a bridge of the structure ##STR3## or a pharmaceutically utilizable hydrate, acid addition salt, alkali metal salt, alkaline earth metal salt, silver salt or guanidinium salt of the carboxylic acid when R.sup.2 is hydrogen.

Abstract: 7-(1-Pyrrolidinyl)-3-quinolone- and -naphthyridonecarboxylic acid derivatives as antibacterial agents and feed additives, of the formula ##STR1## in which X.sup.1 is halogen,X.sup.2 is hydrogen, halogen, amino or other radical,R.sup.1 is alkyl, cycloalkyl, optionally substituted phenyl or other radical,R.sup.2 is hydrogen, alkyl or a dioxolylmethyl radical,R.sup.3 is ##STR2## and A is N, CH, C-halogen, or the like, or forms a bridge with R.sup.1,and addition products thereof.

Abstract: 7-(Aminomethyl-oxa-7-aza-bicyclo[3.3.0]oct-7-yl)quinolonecarboxylic acid and 7-(aminomethyl-oxa-7-aza-bicyclo[3.3.0]oct-7-yl)naphthyridonecarboxyli c acid derivatives The invention relates to novel derivatives of quinolonecarboxylic acid and naphthyridonecarboxylic acid which are substituted in the 7 position by a 1- (or 5-)aminomethyl-2- (or 3-)oxa-7-aza-bicyclo[3.3.0]oct-7-yl residue, their salts, processes for their preparation and antibacterial agents containing these compounds.

Abstract: The invention relates to new 7-(2,7-Diazabicyclo[3.3.0]octyl)-3-quinolone- and -naphthyridonecarboxylic acid derivatives, processes for their preparation, and anti-bacterial agents and feed additives containing them.

Abstract: An antibacterially active quinolone or naphthyridonecarboxylic acid derivative of the formula ##STR1## in which R.sup.1 stands for various organic radical,R.sup.2 stands for hydrogen, alkyl having 1 to 4 carbon atoms or (5-methyl-2-oxo-1,3-dioxol-4-yl)methyl,R.sup.3 stands for hydrogen or amino,R.sup.4 stands for a radical of the formula ##STR2## A stands for N or C--R.sup.5, whereinR.sup.5 stands for hydrogen, halogen methyl, cyano or nitro or else together with R.sup.1 can form a bridge of the structure ##STR3## or a pharmaceutically utilizable hydrate, acid addition salt, alkali metal salt, alkaline earth metal salt, silver salt or guanidinium salt of the carboxylic acid when R.sup.2 is hydrogen.

Abstract: The invention relates to new 3-substituted cephalosporins, to a process for their preparation and to their use as medicaments, in particular as medicaments having antibacterial activity.The invention relates to compounds of the general formula (I) ##STR1## in which X, Y, R.sup.1 and R.sup.2 have the meaning indicated in the description.

Abstract: Antibacterial 5-alkylquinolonecarboxylic acids of the formula ##STR1## in which R.sup.3 is C.sub.1 -C.sub.4 - alkyl,R.sup.1 is optionally substituted alkyl or cycloalkyl, alkenyl, alkoxy, amino or alkylamino or optionally substituted phenyl,R.sup.2 is hydrogen or optionally substituted alkyl,R.sup.4 is a nitrogen-containing heterocyclic radical, andA is hydrogen, halogen, methyl, cyano or nitro, or forms a bridge with R.sup.1.and hydrates and salts thereof.

Abstract: The invention relates to new 7-(2,7-Diazabicyclo[3.3.0]octyl)-3-quinolone- and -naphthyridonecarboxylic acid derivatives, processes for their preparation, and antibacterial agents and feed additives containing them.

Abstract: Antibacterial 8-cyano-1-cyclopropyl-1,4-dihydro-4-oxo-3-quinolinecarboxlyic acid derivatives of the formula ##STR1## in which Y represents a carboxyl group, a nitrile group, an ester group --COOR.sup.1 or an acid amide group --CONR.sup.2 R.sup.3,X.sup.1 represents hydrogen nitro, alkyl or halogenX.sup.4 can be hydrogen or halogen, or alkyl,R.sup.4 and R.sup.5, together with the nitrogen atom to which they are bonded, form a 5- or 6-membered heterocyclic ring which can additionally contain the atoms or groups --O--, --S--, --SO--, --SO.sub.2 --, ##STR2## as ring members or the group ##STR3## can also represent a ring system of the structure ##STR4## which can optionally be substituted on the ring carbons by methyl and pharmaceutically usable hydrates, salts or esters thereof.These compounds have a high antibacterial activity and are therefore suitable as active compounds for human and veterinary medicine.