Patent ID: 8053446

Claim:
A compound of formula I wherein R 1 is one or more same or different substituents independently selected from the group consisting of hydrogen, halogen or a straight or branched, saturated or unsaturated C 1-6 hydrocarbon radical, optionally substituted with halogen, hydroxy, cyano, nitro, carboxy, alkoxy, alkoxycarbonyl, alkylcarbonyl, formyl, amino, aminoalkyl, aminocarbonyl, alkylcarbonylamino, sulfo, aminosulfonyl, alkylsulfonylamino, hydroxysulfonyloxy, dihydroxyphosphinoyloxy or phosphono; X is a straight or branched, saturated or unsaturated C 1-12 hydrocarbon diradical, optionally substituted with halogen, hydroxy, cyano, nitro, carboxy, alkoxy, alkoxycarbonyl, alkylcarbonyl, formyl, amino, aminoalkyl, aminocarbonyl, alkylcarbonylamino, sulfo, aminosulfonyl, alkylsulfonylamino, hydroxysulfonyloxy, dihydroxyphosphinoyloxy or phosphono; and R 2 and R 3 together with the nitrogen atom to which they are attached form a 5-12 membered monocyclic ring system or an unsaturated or partially saturated quinoline or indole ring system optionally including one or more additional heteroatoms selected from the group consisting of nitrogen, sulphur or oxygen, said ring system being substituted with a group ═O at one carbon atom thereof, and optionally substituted with one or more substituents selected from the group consisting of halogen, hydroxy, cyano, nitro, alkoxy, alkoxycarbonyl, alkylcarbonyl, formyl, aminoalkyl, a straight or branched, saturated or unsaturated C 1-6 hydrocarbon radical, optionally substituted with halogen, hydroxy, cyano, nitro, alkoxy, alkoxycarbonyl, alkylcarbonyl, formyl or aminoalkyl, or —C(═O)NR 5 R 6 , —NHC(═O)R 5 , —NHC(═O)R 5 R 6 , —NHC(═O)OR 5 , —OC(═O)R 5 or wherein R 5 and R 6 are the same or different and independently selected from the group consisting of hydrogen, C 1-6 alkyl optionally substituted with one or more halogen, hydroxy, cyano, nitro, amino, —NHC(═O)R 5 R 6 , —NHC(═O)OR 5 or provided that R 1 is not attached to the nitrogen atom of the pyridyl ring; or a pharmaceutically acceptable salt or N-oxide thereof.