摘要:
A quinolonecarboxylic acid compound of the formula I wherein R¹ is an alkyl group, a cycloalkyl group, a haloalkyl group, an alkenyl group, mono- or di-alkylamino groups, a phenyl group or a substituted phenyl group by one to three substituents selected from the group consisting of a halogen atom, an alkyl group, an alkoxy group, a hydroxy group, a nitro group or an amino group, R² is a hydrogen atom, an alkyl group, a cycloalkyl group, an acyl group or an alkoxycarbonyl group, R³ is a hydrogen atom, an alkyl group or an aralkyl group, or R² and R³ together with the adjacent nitrogen atom form heterocyclic ring, R⁴ is a hydrogen atom or an alkyl group, R⁵ is a hydrogen atom, an alkyl group, an aralkyl group or an ester residue which is readily hydrolyzable in vivo, X is a hydrogen atom, a halogen atom or an alkyl group, n is integer of 1 to 3, and a salt thereof, and pharmaceutical use thereof. Said compounds exhibit antibacterial activities and are useful for the treatment of various infectious diseases.
摘要:
A process for preparing a stable Bacampicillin 6β-halopenicillanate which comprises reacting Bacampicillin hydrochloride with an alkali metal salt or an amine salt of 6β-halopenicillanic acid under heating. The salt produced by the method of the present invention is remarkably stable against coloration and thermal decomposition in the long term storage.
摘要:
A quinolonecarboxylic acid compound of the formula I wherein R¹ is an alkyl group, a cycloalkyl group, a haloalkyl group, an alkenyl group, mono- or di-alkylamino groups, a phenyl group or a substituted phenyl group by one to three substituents selected from the group consisting of a halogen atom, an alkyl group, an alkoxy group, a hydroxy group, a nitro group or an amino group, R² is a hydrogen atom, an alkyl group, a cycloalkyl group, an acyl group or an alkoxycarbonyl group, R³ is a hydrogen atom, an alkyl group or an aralkyl group, or R² and R³ together with the adjacent nitrogen atom form heterocyclic ring, R⁴ is a hydrogen atom or an alkyl group, R⁵ is a hydrogen atom, an alkyl group, an aralkyl group or an ester residue which is readily hydrolyzable in vivo, X is a hydrogen atom, a halogen atom or an alkyl group, n is integer of 1 to 3, and a salt thereof, and pharmaceutical use thereof. Said compounds exhibit antibacterial activities and are useful for the treatment of various infectious diseases.