New furanone derivatives, processes for preparation thereof and use thereof
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0189272A2
公开(公告)日:1986-07-30
The present invention provides compounds of the general formula:
wherein R1 is a hydroxyl or protected hydroxyl group or a carboxyl group or a lower alkoxycarbonyl or benzyloxy radical, R2 is a hydrogen or halogen atom or a halo(lower)alkyl radical, R3 is a hydrogen atom, a hydroxyl group or a lower alkoxy radical and A is a lower alkylene radical; and the pharmaceutically acceptable salts thereof.
The present invention also provides processes for the preparation of these compounds and pharmaceutical compositions containing them and is also concerned with the use thereof.
Various analogues of WF-3681 (1a), a novel aldose reductase inhibitor, were synthesized and examined for aldose reductase-inhibitory activity. It was found that the carboxylic acid function is necessary and the side-chain length is important for the activity. Furthermore, the lipophilicities of the benzene ring and the enol ether group are significant for increasing the activity.