Abstract: Benzo[f]naphthyridine derivatives of formula (I): benzo[f]naphthyridine derivatives and benzo[f]naphthyridine esters of formula (IVa): aminoquinoline derivatives of formula (X): processes for preparing such compounds; and compositions comprising them.

Abstract: Novel 1,8-benzo-naphthyridine derivatives of general formula (I): which are useful as antimicrobial agents.

Abstract: Benzo[f]naphthyridine derivatives of formula (I): 1

Abstract: Novel 1,8-benzo-naphthyridine derivatives of general formula (I): 1

Abstract: This invention relates to a novel 1,8 benzo[b]naphythyridine derivative of general formula (I), ##STR1## wherein R is H or a hydroxy, amino or alkylamino radical optionally substituted by amino or hydroxy, or R is dialkylamino of which the alkyl portions may form, with the nitrogen atom, a 5- or 6-membered heterocyclic ring which optionally contains a further heteroatom chosen from nitrogen, oxygen or sulphur, or R is C.sub.3-6 cycloalkylamino or an alkanylamino, N-alkyl N-alkanylamino or aminoalkylphenylamino radical; R.sub.1 and R.sub.2, which are the same or different, are in positions 2 and 3 and represent H, alkyl, C.sub.2-4 alkenyl, phenyl, or substituted phenyl, or R.sub.1 and R.sub.2 are in position 2 and represent alkyl; R.sub.3 is H or alkyl, fluoroalkyl, carboxyalkyl, C.sub.3-6 cycloalkyl, fluorophenyl, difluorophenyl, alkyloxy or alkylamino; and R.sub.4 is H or F, wherein the C.sub.

Abstract: New benzo[b][1,8]naphthyridine derivatives of general formula (I), in which R.sub.1 is a hydrogen atom or a hydroxyl or alkyl radical, R.sub.2 is a hydrogen atom or an alkyl, fluoroalkyl, cycloalkyl (3 to 6 C), alkyloxy or alkylamino radical, R.sub.3 is a phenyl or phenylalkyl radical substituted with one or more halogen atoms or alkyl, cycloalkyl (3 to 6 C), alkyloxy, cyano, amino, alkylamino, dialkylamino, alkyloxyalkyl, hydroxyalkyl, hydroxyalkyloxy, methylenedioxy, aminoalkyl, alkylaminoalkyl or dialkylaminoalkyl radicals, or R.sub.3 is a heterocyclic radical, and R.sub.4 is a hydrogen atom or a fluorine atom, the alkyl radicals (1 to 4 C) being linear or branched, their salts, their preparation and compositions containing them.These new products are useful as antimicrobials, or in the treatment of AIDS.

Abstract: New benzo[b][1,8]naphthyridine derivatives of general formula (I) in which R.sub.1 is a hydrogen atom or an alkyl or hydroxyalkyl radical, R.sub.2 is a hydrogen atom or an alkyl, fluoroalkyl, cycloalkyl (3 to 6 C), alkoxy or alkylamino radical and R.sub.3 is alkyl, R.sub.4 and R.sub.5 are different and are hydrogen or alkyl, or R.sub.3 is H, alkyl or cycloalkyl and R.sub.4 and R.sub.5 are hydrogen, R.sub.6 is hydrogen or fluorine and n is equal to 1 or 2, their salts, their preparation and the compositions which contain them.

Abstract: New benzo[b][1,8]naphthyridine derivatives of general formula (I), in which R is a hydrogen atom or an alkyl, fluoroalkyl, cycloalkyl (3 to 6 C), alkoxy or alkylamino radical or an amine protective radical and either Hal is a fluorine, chlorine or bromine atom and R' is a hydrogen atom or Hal and R' are simultaneously fluorine atoms, their salts, their preparation and the compositions which contain them.These new products can be used as antimicrobial agents for topical application or as synthesis intermediates.

Abstract: New benzo[b][1,8]naphthyridine derivatives of general formula (I) in which R is a hydrogen atom or an alkyl, fluoroalkyl, cycloalkyl (3 to 6 C), alkoxy, alkylamino or protected alkylamino radical, Hal is F, Cl or Br if R' is hydrogen, or Hal and R' are F, and Alk is an alkyl radical, and their preparation.These new products can be used as intermediates for the preparation of biologically active products.