FUTURE MEDICINAL CHEMISTRY, cilt.10, sa.19, ss.2293-2308, 2018 (SCI-Expanded)
Aim: Synthesis of novel 2(2-hydroxyphenyl) pyrimidine/benzothiazole piperazinyl-substituted flavones end evaluate their antioxidant activity. Results: Six novel 2-(2-hydroxyphenyl) pyrimidine/benzothiazole-substituted flavones were synthesized, their structures were confirmed by elementary and spectral analyses. The compounds were evaluated for their in vitro antioxidant potency by employing various antioxidant assays. Conclusion: All tested compounds acted as scavengers of free radicals like hydroxyl (15-45%),2,2-diphenyl-1-picrylhydrazyl(center dot) (17-48%) at 1.25 and 0.5mM concentrations respectively. The total antioxidant status activity values of the compounds ranged from 234.1 to 464.1m trolox equivalent/g, the total antioxidant capacity - from 24.9 to 52.7m trolox equivalent per gram. Compounds incorporating the benzothiazole group on the piperazine ring were more effective antioxidants than those with the 2-(2-hydroxyphenyl) pyrimidine group.