Synthesis and Antioxidant Activity Studies of Some 5-Chloro-3-substituted 2(3H)-Benzoxazolone Derivatives

摘要

2(3H)-Benzoxazolone derivatives are versatile heterocyclic compounds since they display a wide range of pharmacological properties. On the other hand, anilide pharmacophore has been known in medicinal chemistry as an useful template in various pharmacological states. In this study, we synthesized eleven 5-chloro-2(3H)-benzoxazolone-3-alkananiIide derivatives and evaluated their antioxidant activities. The structural confirmation of the title compounds was achieved by spectral and analytical data. The antioxidant capacity of the synthesized compounds was determined by the 2,2-diphenyl-2-picrylhydrazyl hydrate (DPPH) and 2,2-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radicals scavenging assays. The results indicated that the majority of the compounds were effective in both tests. The most active compound in the series was compound 6, bearing 4-methoxy substituent on the N-phenyl ring of the propionanilide skeleton.