Patent ID: 8030345

Claim:
A compound of formula (I): a tautomeric form, or pharmaceutically acceptable salt thereof, wherein Ar represents a single or fused group selected from the group consisting of aryl, heterocyclyl or heteroaryl group, optionally substituted with one or more groups selected from the group consisting of hydroxy, halo, amino or optionally substituted groups selected from the group consisting of linear or branched alkyl, monosubstituted or disubstituted amino, alkoxy or acyl group wherein the substituted alkyl, monosubstituted or disubstituted amino, alkoxy or acyl group is substituted by one or more of hydroxy, halo, amino, linear or branched alkyl, monosubstituted or disubstituted amino, alkoxy or acyl group; A represents an optionally substituted phenyl group, X is oxygen or sulfur m is two and n is zero; wherein when A is substituted, the one or more substituents are the selected from the group consisting of halogen, hydroxyl, thio, nitro, amino, cyano, or an optionally substituted group selected from linear or branched alkyl, alkoxy, thioalkyl, haloalkyl, haloalkoxy, acyl, and aminoalkyl groups; wherein the substituted alkyl, alkoxy, thioalkyl, haloalkyl, haloalkoxy, acyl and aminoalkyl groups are substituted by one or more of halogen, hydroxyl, thio, nitro, amino, cyano, linear or branched alkyl, alkoxy, thioalkyl, haloalkyl, haloalkoxy, acyl, and aminoalkyl groups; and R 1 represents O, S, or the group represented by N-Q, where Q represents H or substituted alkyl; or R 1 represents the group represented by SO 2 R″, where R″ represents H, —OH, halogen or a substituted or unsubstituted group selected from alkyl, aryl, heteroaryl or heterocyclic groups; R 2 is either H or (C 1 -C 6 ) alkyl; R 3 is NR b R c wherein R b and R c are the same or different and are selected from an optionally substituted group selected from alkyl, aralkyl or alkenyl or R b and R c together with the nitrogen atom to which they are bonded, form a saturated or unsaturated heterocyclic or heteroaromatic radical or a pharmaceutically acceptable salt thereof.