US 6,211,375 B1 · Pyridonecarboxylic acid derivatives or salts thereof and antibacterial agents containing the same as the active ingredient

Abstract

A novel pyridonecarboxylic acid derivative or its salt exhibiting satisfactory antibacterial activities, intestinal absorption, metabolic stability, and reduced side effects, in particular, phototoxicity and cytotoxicity, as well as an antibacterial agent containing such pyridonecarboxylic acid derivative or its salt are provided. For such an object, a pyridonecarboxylic acid derivative represented by the following formula (1): (wherein R1 represents hydrogen atom, a halogen atom or a lower alkyl group; R2 represents hydrogen atom or a lower alkyl group; R3 represents substituted or unsubstituted amino group or hydroxyl group; and R4 represents hydrogen atom, a lower alkyl group, amino group or nitro group) or its salt is provided.

Claims5

Dependent claims

A pyridonecarboxylic acid derivative represented by the following formula (1):

(wherein R1 represents hydrogen atom, a halogen atom or a lower alkyl group;
R2 represents hydrogen atom or a lower alkyl group;
R3 represents substituted or unsubstituted amino group or hydroxyl group wherein the substituents of the substituted amino group are selected from the group consisting of a lower alkyl group, a lower alkenyl group, an aralkyl group containing 7 to 11 carbon atoms, an aryl group containing 6 to 14 carbon atoms, a lower alkanoyl group, a lower alkoxycarbonyl group, an aroyl group containing 7 to 15 carbon atoms, and R4 represents hydrogen atom, a lower alkyl group, amino group or nitro group) or its salt.

Dependencies are inferred from the claim text.

Pyridonecarboxylic acid derivatives or salts thereof and antibacterial agents containing the same as the active ingredient

Life of this patent

Pyridonecarboxylic acid derivatives or salts thereof and antibacterial agents containing the same as the active ingredient

Life of this patent

Abstract

Claims5