Antioxidant activity of novel 4H- chromene tethered 1,2,3-Triazole Analogues: Synthesis and molecular docking studies

Abstract

Novel 4H chromene coupled triazole hybrids 8a-l were synthesized through a hassle free multicomponent one pot synthesis and click chemistry protocols. The structures of novel compounds were established by interpretation of 1H NMR, 13C NMR, IR and Mass spectral data. The novel hybrids were screened for their invitro antioxidant activity by employing DPPH and Hydrogen peroxide radical scavenging assays, using Ascorbic acid as standard reference. Novel compounds 8h and 8i exhibited superior radical quenching percentage with IC50 value of 1.29 ± 0.35 and 1.23 ± 0.34 µM respectively, compared to the IC50 value of (1.46 ± 0.52 µM)Ascorbic acid. Compounds 8f, 8j and 8k also demonstrated best IC50 value of 3.02 ± 0.62, 2.45 ± 0.53 and 3.18 ± 0.25 µM in comparison to reference. The molecular docking studies of target compounds against the crystal structure of NADPH oxidase endorsed best docking scores and binding interactions, and are in agreement to experimental data.