Naphthyridine derivatives and salts thereof useful as antibacterial agents
AssigneesDainippon Pharmaceutical Co., Ltd., Laboratoire Roger Bellon
InventorsJun-ichi Matsumoto, Yoshiyuki Takase, Yoshiro Nishimura
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Abstract
This invention relates to 1,8-naphthyridine compounds of the formula ##STR1## wherein X is a halogen atom especially fluorine atom, R.sub.1 is an ethyl group or a vinyl group, and R.sub.2 is a hydrogen atom or a lower alkyl group, their salts and processes for the preparation of them. The 1,8-naphthyridine compounds and their salts are useful as antibacterial agents and intermediates thereof.
Claims4
A 1,8-naphthyridine compound of the formula ##STR31## or a nontoxic pharmaceutically acceptable salt thereof.
1-Ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-1,8-naphthyridine-3 -carboxylic acid.
1-Ethyl-6-fluo ro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-1,8-naphthyridine-3-carboxylic acid methanesulfonate.
Dependencies are inferred from the claim text.