UTILISATION DE DERIVES DE BICYCLES MONO OU DICETONIQUES, NOUVEAUX COMPOSES OBTENUS ET LEUR APPLICATION EN THERAPEUTIQUE

The therapeutical use of bicyclic derivatives and pharmaceutically acceptable salts thereof having general formula (I), wherein each of X1, X2, X3 and X4 is independently a carbon atom or a nitrogen atom, with n being 0 or 1; A is selected from an oxygen atom and a carbonyl grouping; each of R1 and R2 is independently either: a hydrogen atom; or an optionally substituted aromatic ring or an optionally substituted heteroaromatic ring having one or more heteroatoms, a saturated ring optionally having one or more heteroatoms, optionally substituted by an alkyl chain; or a chain having 1-4 atoms, consisting of optionally substituted nitrogen, a carbonyl grouping optionally terminated with an optionally substituted aromatic ring or an optionally substituted heteroaromatic ring optionally having one or more heteroatoms; R3 is a hydrogen atom, a halogen atom, a C1-5 alkyl radical, a nitrogen radical substituted by two groupings that are each independently a hydrogen atom or a C1-5 alkyl grouping optionally incorporating a carbonyl grouping, or an aromatic ring; and R4 is a hydrogen atom, a halogen atom, a C1-5 alkyl radical, or an optionally substituted oxygen-containing derivative, with the exception of 6-phenylamino-5,8-quinolinedione and 2-N-acetylamino-1,4-naphthoquinone.