1-cyclopropyl-6-fluoro-8-alkyl-1,4-dihydro-4-oxo-quinoline-3-car

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...

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546156, 544363, 544389, 544395, 548557, 548567, 548568, 558 54, 558388, 558418, 558425, 560 53, 560 51, 560103, 562493, 562494, 564215, 564440, 564441, 564442, 260544R, 568812, 568938, 568709, 570182, A61K 3147, C07D40104

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active

048552925

ABSTRACT:
Novel 4-oxoquinoline-3-carboxylic acid compounds of the formula: ##STR1## wherein R.sup.2 is 1-pyrrolidinyl which may have 1 to 2 substituents selected from the group consisting of (i) C.sub.1 -C.sub.6 alkyl, (ii) amino-(C.sub.1 -C.sub.6)alkyl, said amino being optionally substituted by 1 or 2 substituents selected from C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkanoyl, and C.sub.1 -C.sub.6 alkoxycarbonyl, (iii) amino which may be substituted by 1 or 2 substituents selected from C.sub.1 -C.sub.6 alkyl, phenyl(C.sub.1 -C.sub.6)alkyl, C.sub.1 -C.sub.6 alkoxycarbonyl, and C.sub.1 -C.sub.6 alkanoyl, and (iv) 2-oxo-1,3-dioxolenemethylamino which is substituted by C.sub.1 -C.sub.6 alkyl; or 1-piperidinyl which may have 1 to 3 substituents selected from oxo, hydroxy, halogen and C.sub.1 -C.sub.6 alkyl, and R.sup.3 is C.sub.1 -C.sub.6 alkyl, or a pharmaceutically acceptable salt thereof, said compounds having excellent antimicrobial activity and hence being useful as an antimicrobial agent, and a pharmaceutical composition containing said compound as an active ingredient.

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