Patent ID: 7423158

Claim:
A compound of formula I wherein R 1 and R 2 are each independently H or an alkyl, cycloalkyl, cycloheteroalkyl, aryl or heteroaryl group each optionally substituted or R 1 and R 2 may be taken together with the atom to which they are attached to form an optionally substituted 5- to 7-membered ring optionally interrupted by an additional heteroatom selected from O, N or S; R 3 is H or an alkyl, cycloalkyl, cycloheteroalkyl, aryl or heteroaryl group each optionally substituted; R 4 , R 5 and R 6 are each independently H, Cl, I, F, NO 2 , CN, COR 7 , NR 10 CO 2 R 11 , NR 15 COR 16 , OR 14 , NR 12 R 13 , SO n R 17 or an alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, cycloalkyl or cycloheteroalkyl group each optionally substituted or when attached to adjacent carbon atoms R 4 and R 5 may be taken together with the atoms to which they are attached to form an optionally substituted 5- to 7-membered ring optionally containing one or two heteroatoms selected from O, N or S; n is 0, 1 or 2; R 7 and R 17 are each independently H, NR 8 R 9 or an alkyl, haloalkyl, alkoxyalkyl, alkenyl, alkynyl, cycloalkyl or aryl group each optionally substituted; R 8 and R 9 are each independently H or an alkyl, alkenyl, alkynyl or cycloalkyl group each optionally substituted or R 8 and R 9 may be taken together with the atom to which they are attached to form an optionally substituted 5- to 7-membered ring optionally containing an additional heteroatom selected from O, N or S; R 11 , R 14 and R 16 are each independently H or an alkyl, haloalkyl, alkoxyalkyl, alkenyl, alkynyl, cycloalkyl or aryl group each optionally substituted; R 10 and R 15 are each independently H or an optionally substituted alkyl group; and R 12 and R 13 are each independently H or an alkyl or cycloalkyl group each optionally substituted or R 12 and R 13 may be taken together with the atom to which they are attached to form an optionally substituted 5- to 7-membered ring optionally containing an additional heteroatom selected from O, N or S; or a tautomer thereof, a stereoisomer thereof or a pharmaceutically acceptable salt thereof.