PHENYL-ALKANOIC ACID DERIVATIVE AND PREPARATION THEREOF

摘要

Phenyl alkanoic acid derivatives and pharmaceutically acceptable salts thereof as well as processes for their preparation are provided; the new compounds have the fomula: < IMG > (I) wherein R1 is halogen, hydroxy, lower alkyl or lower alkoxy, Ra3 is alkylene or lower alkenylene optionally substituted by a phthalimido group, and X is O, S, SO or SO2; the compounds have anti-inflammatory, analgesic and antipyretic activities.