Oxyphthalazinyleddikesyre heterocyclic compounds and pharmaceutical compositions for the inhibition of aldose reductase activity

摘要

A heterocyclic oxophthalazinyl acetic acid having aldose reductase inhibitory activity has the formula CHEM wherein X is oxygen or sulfur, Z is a covalent bond, O, S, NH or CH2; R1 is hydroxy, or a prodrug group; R2 is a heterocyclic group, R3 and R4 are hydrogen or the same or a different substituent, and R5 is hydrogen or methyl. The pharmaceutically acceptable acid addition salts of the above compounds wherein R1 is di(C1-C4)alkylamino or (C1-C4)alkoxy substituted by N-morpholino or di(C1-C4)alkylamino and the pharmaceutically active base addition salts of the above compounds wherein R1 is hydroxy are also aldose reductase inhibitors.