THIADIAZOLE SUBSTITUTED COUMARIN DERIVATIVES AND THEIR USE AS LEUKOTRIENE BIOSYNTHESIS INHIBITOR

摘要

The instant invention provides compounds of Formula (Ia) which are leukotriene biosynthesis inhibitors, wherein X is O or S, Y is O, S,-NR6-CHR7-or-NR8-C(O)-and A is selected from 5-membered aromatic heterocyclic ring, 6-membered aromatic heterocyclic ring, naphthelenic or heterobicyclic aromatic ring system, phenyl and benzyl. A is optionally mono-or disubstituted. Compounds of Formula (Ia) are useful as anti-atherosclerotic, anti-asthmatic, anti-allergic, anti-inflammatory and cytoprotective agents.