Patent ID: 8399483

Claim:
A compound of formula (IA) or an N-oxide thereof, or a pharmaceutically acceptable salt thereof: wherein Alk 1 represents a straight or branched C 1-3 alkylene chain; L 1 represents NR 9 ; Y represents pyrrolyl, pyridin-2-yl, pyridin-3-yl, indolyl, isoquinolinyl, imidazolyl, pyrazolyl, triazolyl, pyridazinyl, pyrimidin-5-yl, pyrazinyl, triazinyl, indazolyl, furopyridinyl, benzoxazolyl, benzothiazolyl, cinnolinyl, phthalazinyl, quinazolinyl, purin-1-yl, purin-2-yl, purin-3-yl, purin-7-yl, purin-8-yl, pyrazolo[3,4-d]pyrimidin-4-yl, triazolopyrimidinyl, naphthyridinyl, pteridinyl or pyridopyrimidin-4-yl, any of which groups may be optionally substituted by one, two or three substituents independently selected from halogen, cyano, nitro, C 1-6 alkyl, trifluoromethyl, hydroxy, C 1-6 alkoxy, difluoromethoxy, trifluoromethoxy, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, amino, C 1-6 alkylamino, di(C 1-6 )alkylamino, C 2-6 alkylcarbonylamino, C 1-6 alkylsulfonylamino, formyl, C 2-6 alkylcarbonyl, C 3-6 cycloalkylcarbonyl, C 3-6 heterocycloalkylcarbonyl, carboxy, C 2-6 alkoxycarbonyl, aminocarbonyl, C 1-6 alkylaminocarbonyl, di(C 1-6 )alkylaminocarbonyl, aminosulfonyl, C 1-6 alkylaminosulfonyl, di(C 1-6 )alkylaminosulfonyl, oxo and arylamino; R 1 , R 2 and R 3 independently represent hydrogen, halogen, cyano, nitro, C 1-6 alkyl, trifluoromethyl, aryl(C 1-6 )alkyl, hydroxy, C 1-6 alkoxy, difluoromethoxy, trifluoromethoxy, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, amino, C 1-6 alkylamino, di(C 1-6 )alkyl-amino, C 2-6 alkylcarbonylamino, C 2-6 alkoxycarbonylamino, C 1-6 alkylsulfonylamino, formyl, C 2-6 alkylcarbonyl, carboxy, C 2-6 alkoxycarbonyl, aminocarbonyl, C 1-6 alkylaminocarbonyl, di(C 1-6 )alkylaminocarbonyl, aminosulfonyl, C 1-6 alkylaminosulfonyl or di(C 1-6 )alkylaminosulfonyl; R 4 represents a group of formula (a): in which represents the bond attaching the ring A to the rest of the molecule; A represents a monocyclic aryl or heteroaryl group; R 5 , R 6 and R 7 independently represent hydrogen, halogen, cyano, nitro, C 1-6 alkyl, trifluoromethyl, hydroxy, C 1-6 alkoxy, difluoromethoxy, trifluoromethoxy, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, amino, C 1-6 alkylamino, di(C 1-6 )alkylamino, C 2-6 alkylcarbonylamino, C 2-6 alkoxycarbonylamino, C 1-6 alkylsulfonylamino, formyl, C 2-6 alkylcarbonyl, carboxy, C 2-6 alkoxycarbonyl, aminocarbonyl, C 1-6 alkylaminocarbonyl, di(C 1-6 )alkylaminocarbonyl, aminosulfonyl, C 1-6 alkylaminosulfonyl, di(C 1-6 )alkylamino-sulfonyl, C 3-7 cycloalkyl or C 3-6 heterocycloalkyl, or optionally substituted monocyclic aryl or heteroaryl; R 8 represents hydrogen, halogen, C 1-6 alkyl or C 1-6 alkoxy; and R 9 represents hydrogen or C 1-6 alkyl.