主权项 |
1. A compound of formula (I) or a pharmaceutically acceptable salt thereof, wherein:
R1 is selected from imidazopyridazine, isoquinolinyl, oxazolyl, pyridinyl, pyrimidinyl, pyrrolopyridinyl, and quinolinyl, wherein each ring is optionally substituted with C1-C3acylamino, C1-C3alkyl, amino, C1-C3alkoxy, C3-C6cycloalkyl, C3-C6cycloalkylamino, C1-C3dialkylamino, —NHCO2(C1-C3)alkyl, and phenylcarbonylamino optionally substituted with a halo or haloalkyl group;R2 is selected from hydrogen, C1-C3alkoxy, and C1-C3alkyl;R3 is selected from hydrogen, C1-C3alkoxy, C1-C3alkyl, cyano, and halo;R4 is selected from C3-C6alkyl optionally substituted with one group selected from amino, haloalkyloxy, hydroxy and oxo; and C3-C6cycloalkylC1-C3alkyl optionally substituted with amino;R5 is selected from hydrogen, C1-C6alkyl, amido, cyano, and halo;when is a double bond, R6 is selected from hydrogen, C1-C6alkoxy, C1-C6alkyl, amido, cyano, C1-C6dialkylamino, halo, hydroxy, and a five-membered heteroaromatic ring; andwhen is a single bond, R6 is =S. |