Patent ID: 8557984

Claim:
A compound of formula (I) or a salt thereof wherein: A is a group selected from the following: X represents CH or N; Y represents CH or N with the proviso that when X is N, Y is CH; R x represents O or S; R 1 represents C 1-6 alkyl, C 3-6 cycloalkyl, a 5 or 6 membered heterocyclyl, an aromatic group or a heteroaromatic group, wherein the aromatic group or the heteroaromatic group is optionally substituted by one to three groups selected from: halogen, hydroxy, cyano, nitro, C 1-6 alkyl, C 1-4 alkoxy, haloC 1-4 alkyl, haloC 1-4 -alkoxy, hydroxyC 1-4 alkyl, C 1-4 -alkoxyC 1-4 alkyl, C 1-4 -alkoxycarbonyl, C 1-4 -alkylsulfonyl, C 1-4 -alkylsulfonyloxy, C 1-4 alkylsulfonylC 1-4 alkyl, C 1-4 -alkylsulfonamido; R 2 is hydrogen or C 1-6 alkyl, R 2a represents: H, C 1-6 alkyl, C 1-6 haloallyl, (CH 2 ) m cyano, (CH 2 ) m OH, (CH 2 ) m C 1-6 alkoxy, (CH 2 ) m C 1-6 haloalkoxy, (CH 2 ) m C 1-6 haloalkyl (CH 2 ) m C(O)NR a R b , (CH 2 ) m NR a R b and (CH 2 ) m C(O)CH 3 , (CHR 6 ) p phenyl optionally substituted by C 1-6 alkyl, C 1-6 alkoxy, cyano haloC 1-4 -alkoxy, haloC 1-4 -alkyl, (CHR 6 ) p heteroaromatic, (CHR 6 ) p heterocyclyl, wherein R a represents H, C 1-6 alkyl, or heterocyclyl; R b represents H or C 1-6 alkyl, or R a and R b together with the N to which they are attached form a 5 or 6 membered heterocyclyl; R 2b represents H, C 1-6 alkyl, (CH 2 ) 2 C 1-6 alkoxy, (CH 2 ) 2 cyano, (CH 2 ) m phenyl, (CH 2 ) 2 heterocyclyl; R 3 represents hydrogen; R 4 represents hydrogen, cyano or C 1-6 alkyl; Z represents O; or when R 4 represents hydrogen and A is a group selected from (i) or (ii) and wherein R x represents 0, Z may additionally represent NH; R 5 represents hydrogen or C 1-6 alkoxy; R 6 represents hydrogen or C 1-6 alkyl; m represents 1, 2 or 3; and n represents 0, 1 or 2 p represents 0, 1 or 2.