PROCESS FOR THE PREPARATION OF PYRIDINOCARBOXYLIC ACIDS ESTERS HAVING AN ANTI-ISCHEMIC AND ANTI-HYPOXYGENIC EFFECT AND APPLICATION THEREOF FOR THE PREPARATION OF PHARMACEUTICAL COMPOSITIONS HAVING AN ANTI-ISCHEMIC AND ANTI-HYPOXYGENIC EFFECT

摘要

Pyridinecarboxylic acid esters of the formula IMAGE (I) in which R is an optionally substituted aryl or heterocyclic radical, R1 and R2 are hydrogen, alkyl, aryl, aralkyl, acyloxyalkyl or hydroxyalkyl, or R1 with X forms a carbonyl-containing heterocyclic ring, X is -CN, -CO-R4, -COOR5 or -SO2R6, R4, R5 and R6 are various optionally substituted radicals, and R3 is different from R5 and is a substituted or interrupted hydrocarbon radical, or pharmaceutically acceptable salts thereof control the otherwise negative effects of ischaemia and/or hypoxia.