Condensed pyridine derivatives as inhibitors of the effects of free radicals.

摘要

Compounds of formula in which R1 represents OH, (C1-C12)alkyl, (C1-C12)alkoxy, benzyloxy, benzyl, phenyl, (C1-C4)alkylNZ1Z2 or NZ1Z2; R2 represents OH, SH, (C1-C4)alkoxy, (C1-C4)alkylthio or NZ1Z2; R3 represents H, (C 1-C4)alkyl, (C1-C4)alkylthio, (C1-C4)alkoxy, phenyl or benzyl; A represents S, and in this case R does not represent anything, or A represents N and R represents H or (C1-C4)alkyl which can be substituted by phenyl or NZ1Z2; B represents a phenyl, pyridyl or thienyl ring which is condensed with the pyridyl ring and B is optionally substituted by one or more groups chosen from halo, (C1-C6)alkyl, (C1-C6)alkoxy, CF3, CH2NZ1Z2 or NZ1Z2; and Z1 and Z2 represent, independently of each other, H, (C1-C6)alkyl, formyl or benzyl or they form, with the nitrogen atom to which they are attached, an optionally substituted saturated heterocycle, it being understood that when A is S, R does not represent anything, R1 is -OCH3, R3 is H and B is thienyl, R2 cannot represent -OH or -OCH3; and their salts, which can be used as medicaments.