Synthesis and Antimicrobial, Antioxidant, ADME-T, and Molecular Docking Studies of Imidazo[1,2-a]pyridine Derivatives

Abstract

A novel series of imidazopyridine Schiff bases have been synthesized by the acid-catalyzed reaction of 7-methyl-2-phenylimidazo[1,2-a]pyridin-3-amine with different aromatic aldehydes. The newly synthesized compounds were characterized by 1H and 13C NMR spectra and LC/MS data and screened for their antibacterial and antifungal activities against two bacterial strains (Pseudomonas aeruginosa and Escherichia coli) and one pathogenic fungal strain (Fusarium oxysporum f. sp. Albedinis) using disk diffusion method. Also, their antioxidant activity was evaluated using DPPH free radical scavenging method. Preliminary bioassay results showed that one of the synthesized compounds showed significant activity against the tested bacterial and fungal strains, while all the compounds displayed moderate antioxidant activities. The structure–activity relationship study revealed that the activity strongly depends on the substitution pattern. On the other hand, in silico ADME-Tox predictions and molecular docking studies were carried out to determine the bioavailability of the synthesized compounds and confirm the antifungal and antibacterial experimental findings.