| 摘要 |
This invention provides compounds for use as positive inotropic agents, bronchodilators, vasodilators and anti-coagulants of the formula: <CHEM> or a pharmaceutically acceptable salt thereof, wherein R1 is hydrogen, C1-C4 alkyl, or chloro; R2 and R3 are independently hydrogen, C1-C4 alkyl, C1-C4 alkoxy, allyloxy, C1-C4 alkylthio, C1-C4 alkylsulfinyl, C1-C4 alkylsulfonyl, hydroxy, halo, cyano, nitro, amino, mono- or di-(C1-C4 alkyl)amino, trifluoromethyl, or C1-C4 alkoxy substituted with a group Z-Q-, wherein Q is oxygen, sulfur, sulfinyl, sulfonyl, or a bond, and Z is a C1-C4 alkyl, phenyl, or phenyl substituted with halo, C1-C4 alkyl, C1-C4 alkoxy, hydroxy, nitro, amino, C1-C4 alkylthio, C1-C4 alkylsulfinyl, or C1-C4 alkylsulfonyl; and R4 is hydrogen, C1-C4 alkyl, or C1-C4 alkoxy; with the provisions that: a) if R1 and two of R2, R3, and R4 are all hydrogen, the other of R2, R3, and R4 is not hydrogen, halo, hydroxy, nitro, amino, di-(C1-C2 alkyl)amino, or C1-C2 alkoxy; b) if R1 and one of R2, R3 and R4 are both hydrogen, and one of R2, R3 and R4 is C1-C2 alkoxy, the other of R2, R3 and R4 is not hydroxy or C1-C2 alkoxy; c) if R1 is chloro and two of R2, R3, and R4 are all hydrogen, the other of R2, R3, and R4 is not hydrogen, halo, C1-C2 alkyl, or nitro; and d) if R1 is chloro and R4 is hydrogen, R2 and R3 may not both be nitro. |
