Patent ID: 8871760

Claim:
A compound of formula I: or a pharmaceutically acceptable salt thereof, wherein: R 1 is: phenyl substituted one, two three or four times, with a substituent or substituents each independently selected from: halo; C 1-6 alkyl; C 1-6 alkoxy; halo-C 1-6 alkyl; halo-C 1-6 alkoxy; C 1-6 alkylsulfonyl; C 1-6 alkylsulfanyl; C 1-6 alkylsulfinyl; phenylsulfonyl wherein the phenyl portion may be substituted with: C 1-6 alkyl; nitrile; hydroxy; C 1-6 alkylcarbonyl; aminocarbonyl; C 1-6 alkoxycarbonyl; C 1-6 alkoxycarbonyl-C 1-6 alkoxy; hydroxycarbonyl; hydroxycarbonyl-C 1-6 alkoxy; C 1-6 alkylaminocarbonyl-C 1-6 alkoxy; C 1-6 alkoxy-C 1-6 alkoxy; hydroxy-C 1-6 alkoxy; C 1-6 alkylamino-C 1-6 alkoxy; C 1-6 alkylsulfony-C 1-6 alkoxy; hydroxy-C 1-6 alkyl; C 3-6 cycloalkyl-C 1-6 alkoxy; amino; amino-C 1-6 alkyl; C 1-6 alkenyl; C 1-6 alkynyl; morpholinyl; morpholinyl-C 1-6 alkyl; piperazinyl; piperidinyloxy; aminocarbonyl-C 1-6 alkoxy; hydroxy C 1-6 alkoxy-C 1-6 alkyl; C 1-6 alkoxyamino-C 1-6 alkyl; hydroxy-C 1-6 alkylamino-C 1-6 alkyl; C 1-6 alkoxycarbonylamino-C 1-6 alkyl; C 1-6 alkylcarbonylamino-C 1-6 alkyl; C 1-6 alkylaminocarbonyl; C 1-6 alkoxycarbonyl-C 1-6 alkyl; C 1-6 alkylaminocarbonyl-C 1-6 alkyl; C 1-6 alkylamino-C 1-6 alkyl; hydroxycarbonyl-C 1-6 alkyl; or nitro; or a five or six membered heteroaryl selected from: pyrrolyl; pyrazolyl; triazolyl; oxazolyl; isoxazolyl; thiazolyl; isothiazolyl; thiadiazolyl; oxadiazolyl; pyridinyl; pyrimidinyl; pyrazinyl; pyridazinyl; or triazinyl, each of which may be substituted once or twice with a group or groups independently selected from: C 1-6 alkyl; halo; C 1-6 alkoxy; hydroxy-C 1-6 alkyl; halo; and oxo; or two adjacent substituents may form a C 1-2 alkylenedioxy or halo-C 1-2 alkylenedioxy; R 2 is phenyl substituted once or twice with a substituent or substituents each independently selected from: fluoro; chloro; methyl; methoxy; or nitrile; R 3 is: hydrogen; or C 1-6 alkyl; X is: —O; and Y is: —O—; —NR d —; —S(O) n — or —CR e R f — wherein n is 0, 1 or 2, wherein R d , R e and R f each independently is hydrogen or C 1-6 alkyl.