Novel intermediates for preparing substitudes thiazolidinedione derivatives

Abstract From the Canadian patent

Compounds of formula (I):, (see fig. I) or a tautomeric form thereof, or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, wherein:, A1 represents a substituted or unsubstituted aromatic heterocyclyl group;, R1 represents a hydrogen atom an alkyl group, an acyl, group, an aralkyl group wherein the aryl moiety may be, substituted or unsubstituted or a substituted or, unsubstituted aryl group; R2 and R3 each represent hydrogen, or R2 and R3 together represent a bond;, A2 represents a benzene ring having in total up to five substituents; and, n represents an integer in the range of from 2 to 6; pharmaceutical compositions containing such compounds …