| abstract |
Compounds of formula (I):where X is N or CH;A represents a group of formula (a) or (b)R1 represents hydrogen or an -NH2, -NR3R4, -NR3CO(C1-C4)Alk or -NR3SO2(C1-C4)Alk group;R2 represents hydrogen, a halogen or a (C1-C4)Alk, (C1-C4)alkoxy, -COOH, -COO(C1-C4)Alk, -CN, -CONR3R4, -NO2, -SO2NR3R4 or -NHSO2(C1-C4)Alk;m and n each represent 0, 1 or 2;R3 and R4 each represent hydrogen or a (C1-C4)Alk group;Y1 and Y2 each represent NH or O;and their salts or solvates, a process for their preparation and the pharmaceutical compositions comprising them. |