BENZO AND PYRIDAZINONE PYRIDAZINONE AND PYRIDAZINTION COMPOUNDS, PHARMACEUTICAL COMPOSITIONS CONTAINING THEM, USE OF THE REFERRED COMPOUNDS AND PROCESS FOR THEIR PREPARATION.

摘要

Benzo or pyridopyridazinones and pyridazinthiones of formula (I) wherein: X and Y are nitrogen or carbon, provided that at least one is carbon, and Z is oxygen or sulfur; R1 is hydrogen, lower alkyl, aryl, heteroaryl, or heterocycle lower alkylene; R2, R3, R4, R5 and R6 are independently selected from hydrogen, lower alkyl, halo, carboxy, alkoxycarbonyl, carbamoyl, acyl, acyl halide, thiomethyl, trifluoromethyl, cyano or nitro; or a pharmaceutically acceptable ester, ether or salt thereof, have been found to be useful as an anti-inflammatory, antiasthmatic, immunosuppressive, anti-allograft rejection, anti-graft-vs-host rejection, autoimmune disease or analgetic agent(s).