7-amino-1-cyclopropyl-4-oxo-1, 4-dihydro-quinoline-and naphthyridine-3-carboxylic acids and antibacterial agents containing these compounds

Claim 2

A compound which is a 7-amino-1-cyclopropyl-4-oxo-1,4-dihydro-quinoline- and -napthyridine-3-carboxylic acid of the formula ##STR32## or a pharmaceutically acceptable acid addition salt or an alkali or alkaline earth metal salt thereof, in which A represents a nitrogen atom or CR 3 , wherein R 3 denotes a hydrogen, a nitro group or a halogen atom, or a carboxamide or carboxyl group, and Z represents a nitrogen atom or C--H, and A and Z cannot simultaneously be nitrogen atoms, and R 1 and R 2 are identical or different and represent a hydrogen atom or a straight-chain or branched alkyl, alkenyl or alkinyl radical which has up to 12 carbon atoms and is optionally substituted by radical(s) selected from hydroxyl, alkoxy, alkylmercapto or dialkylamino with 1 to 3 carbon atoms in each alkyl radical, alkoxycarbonyl with 1 to 4 carbon atoms in the alcohol part, and mono- or bi-cyclic carbocyclic aryl, or furthermore represents a cycloalkyl radical with 3 to 6 carbon atoms, or, together with the nitrogen atom which they substituted or together with a further hetero-atom selected from the group consisting of N, O and S form a 3-membered to 7-membered ring which can be substituted by radical(s) selected from alkyl or alkenyl with 1 to 6 carbon atoms, hydroxyl, alkoxy or alkylmercapto with 1 to 3 carbon atoms, alkoxycarbonyl with 1 to 4 carbon atoms in the alcohol part, and mono- or bi-cyclic carbocyclic aryl.

Claim 3

A compound according to claim 1, in which A represent CR 3 and R 3 represents a fluorine or chlorine atom.

Claim 4

A compound according to claim 1 or 2, in which R 1 and R 2 together with the nitrogen atom which they substituted and oxygen, sulphur or R 4 -substituted nitrogen as a further hetero-atom form a 3-membered or 7-membered ring which may be substituted by radical(s) selected from alkyl or alkenyl with up to 6 carbon atoms, hydroxyl, alkoxy or alkylmercapto with 1 to 3 carbon atoms, alkoxycarbonyl with 1 to 4 carbon atoms in the alcohol part, and mono- or bi-cyclic carboxylic aryl, and in which R 4 represents a hydrogen, or an unsubstituted branched or straight-chain alkyl group which has up to 6 carbon atoms or a branched or straight-chain alkyl which has up to 6 carbon atoms which is substituted by radicals(s) selected from hydroxyl, alkoxy, alkylmercapto or dialkylamino with 1 to 3 carbon atoms per alkyl radical, and alkoxycarbonyl with 1 to 4 carbon atoms in the alcohol part, or represents an phenylalkyl group which has up to 4 carbon atoms in the aliphatic part, or an optionally substituted phenyl or naphthyl group or pyridine, pyrimidine, thiazole or benzothiazole, or R 4 denotes an alkoxycarbonyl group which is optionally substituted by a mono- or bi-cyclic carbocyclic aryl radical and has 1 to 4 carbon atoms in a alcohol part an alkanoyl radical with 1 to 6 carbon atoms, a benzoyl or naphthoyl radical, an alkyl-, phenyl- or naphthyl-(thio) carbamoyl radical, an alkyl-, phenyl- or naphthyl-sulphonyl radical or an aminosulphonyl radical.

Claim 5

A compound according to claim 3, in which R 4 represents a radical of pyridine, pyrimidine, thiazole or benzothiazole.

Claim 6

A 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-piperazino-quinoline-3-carboxylic acid of the formula ##STR33## or salts and/or hydrates thereof, in which R denotes hydrogen, methyl, ethyl or β-hydroxyethyl.

Claim 7

A 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-piperazino-quinoline-3-carboxylic acid of the formula ##STR33## or salts and/or hydrates thereof, in which R denotes hydrogen, methyl, ethyl or β-hydroxyethyl.

Claim 8

A compound according to claim 1 which is 7-(4-methylpiperazino)-1-cyclopropyl-4-oxo-1,4-dihydro-naphthyridine-3-carboxylic acid.

Claim 9

A compound according to claim 1 which is 7-piperazino-1-cyclopropyl-4-oxo-1,4-dihydro-naphthyridine-3-carboxylic acid.

Claim 10

A compound according to claim 1 which is 7-pyrrolidino-1-cyclopropyl-4-oxo-1,4-dihydro-naphthyridine-3-carboxylic acid.

Claim 11

A compound according to claim 1 which is 7-(4-formylpiperazino)-1-cyclopropyl-4-oxo-1,4-dihydro-naphthyridine-3-carboxylic acid.

Claim 12

A compound according to claim 1 which is 7-(4-hydroxyethylpiperazino)-1-cyclopropyl-4-oxo-1,4-dihydro-naphthyridine-3-carboxylic acid.

Claim 13

A compound according to claim 1 which is 7-piperazino-1-cyclopropyl-4-oxo-1,4-dihydro-6-fluoro-quinoline-3-carboxylic acid.

Claim 14

A compound of claim 5 which is 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-piperazino-quinoline-3-carboxylic acid.

Claim 15

A compound of claim 5 which is 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-(4-methylpiperazino)-quinoline-3-carboxylic acid.

Claim 16

A compound of claim 5 which is 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-(4-ethylpiperazino)-quinoline-3-carboxylic acid.

Claim 17

A compound of claim 5 which is 1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-(4-β-hydroxyethyl-peperazino)-quinoline-3-carboxylic acid.

Claim 18

A pharmaceutical composition containing as an active ingredient an antibacterially effective amount of a compound according to claim 1 in admixture with an inert pharmaceutical carrier.

Claim 19

A pharmaceutical composition according to claim 16 in the form of a sterile or physiologically isotonic aqueous solution.

Claim 20

A composition according to claim 16 or 17 containing from 0.5 to 95% by weight of the said active ingredient.

Claim 21

A medicament in dosage unit form comprising an antibacterially effective amount of a compound according to claim 1 together with an inert pharmaceutical carrier.

Claim 22

A medicament of claim 18 in the form of tablets, pills, dragees, capsules, ampoules, or suppositories.

Claim 23

A method of combating bacterial illnesses in warm-blood animals which comprises administering to the animals an antibacterially effective amount of an active compound according to claim 1 either alone or in admixture with a diluent or in the form of a medicament.

Claim 24

An animal feed, food concentrate or drinking water comprising an active compound according to claim 1.