N-alkyl-N-phenylhydroxylamine compounds containing metal chelating groups, their preparation and their therapeutic uses

N-alkyl-N-phenylhydroxylamine derivatives containing metal chelating groups with the following formula (I), and pharmaceutically acceptable salts thereof:

• 6
• wherein,
• R1 denotes branched alkyl, aralkyl, aryl or substituted aryl;
• R2 denotes hydrogen, or COR6 (where, R6 is alkyl or aryl);
• and,
• R3 denotes metal chelating groups such as CO2H, CONH2, CONR4R5 (where, R4 denotes hydrogen, alkyl or aryl;
• and, R5 denotes heterocyclic unsaturated or saturated radical having 1 to 4 heteroatoms of elements nitrogen, oxygen and/or sulfur from the group comprising furanyl, oxazolyl, isooxazolyl, thiophenyl, thiazolyl, isothiazolyl, pyrrolyl, imidazolyl, pyrazolyl, oxadiazolyl, thiadiazoyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, triazolyl, tetrazolyl, it being possible for the heterocyclic radical to be substituted once or twice, identically or differently, by halogen, C1-2-alkyl, C1-4-alkoxy, C1-4-alkylthio, hydroxy, mercapto, trifluoromethyl, nitro, phenyl, nitrile, carboxy or C1-4-alkoxycarbonyl).