A compound of Formula I: ** Formula ** or a pharmaceutically acceptable salt thereof； where: Cy1 is phenyl, pyridyl, pyrimidinyl, pyrazinyl, or pyridazinyl, each of which is optionally substituted by 1, 2, 3, or 4 groups independently selected from R3, R4, R5, and R6； Y is N or CH； R 1 is C 1-6 alkyl, C 1-6 haloalkyl, C 3-7 cycloalkyl, C 3-7 cycloalkyl-C 1-3 alkyl, 4-7 membered heterocycloalkyl, 4-7 membered heterocycloalkyl-C 1-3 alkyl, phenyl, phenyl- C1-3 alkyl, 5-6 membered heteroaryl or 5-6 membered heteroaryl-C1-3 alkyl, each of which is optionally substituted with 1, 2, or 3 substituents independently selected from fluoro, chloro, C1- alkyl 3, -OH, -O (C1-3 alkyl), -CN, -CF3, - CHF2, -CH2F, -NH2, -NH (C1-3 alkyl), - N (C1-3 alkyl) 2, -C (>； = O) N (C1-3 alkyl) 2, -C (>； = O) NH (C1-3 alkyl), - C (>； = O) NH2, - C (>； = O) O (C1- alkyl 3), - S (>； = O) 2 (C1-3 alkyl), - S (>； = O) 2 (C3-6 cycloalkyl), - C (>； = O) (C3-6 cycloalkyl), and C (>； = O) (C1-3 alkyl)； R2 is H or C1-3 alkyl； wherein said C1-3 alkyl is optionally substituted with 1, 2, or 3 substituents independently selected from, chloro, -OH, -O (C1-3 alkyl fluoro), - CN, -CF3, -CHF2, -CH2F, NH2, - NH (C1-3 alkyl), and N (C1-3 alkyl) 2； or R1 and R2, together with the nitrogen atom to which they are attached, form a 4, 5 or 6 membered heterocycloalkyl ring, which is optionally substituted with 1, 2, or 3 substituents independently selected from F, Cl, -OH, -O (C1-3 alkyl), - CN, C1-3 alkyl, C1-3 haloalkyl, -NH2, -NH (C1-3 alkyl), -N (C1-3 alkyl) 2, -CH2CN, and - CH2OH ； R3 is H, F, Cl, -CN, C1-3 alkyl, C1-3 fluoroalkyl, -O (C1-3 alkyl), or -O (C1-3 fluoroalkyl)； R4 is H, F, Cl, -CN, C1-3 alkyl, C1-3 fluoroalkyl, -O (C1-3 alkyl), or -OC (C1-3 fluoroalkyl)； R5 is H, F, Cl, -CN, C1-3 alkyl, C1-3 fluoroalkyl, -O (C1-3 alkyl), or -OC (C1-3 fluoroalkyl)； R6 is H, F, Cl, -CN, C1-3 alkyl, C1-3 fluoroalkyl, -O (C1-3 alkyl), or -OC (C1-3 fluoroalkyl)； R7 is H, F, Cl, C1-3 alkyl, C1-3 haloalkyl,
