Synthesis, characterization and computational studies on (E)-4-(1-((2-hydroxyphenyl)imi no) hexyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one

Abstract

A coupling precursor, 4-hexanoyl-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, 1 synthesized by the reaction of 3-methyl-1-phenyl-1H-pyrazol-5-one with hexanoyl chloride was reacted with 2-aminophenol to synthesize (E)-4-(1-((2-hydroxyphenyl)imino)hexyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, 1a. The compounds were characterized by conventional spectroscopic techniques, ¹H and ¹³C NMR, UV–Visible, FTIR spectroscopy and single crystal X-ray crystallograpic structural determinations and computational techniques. To augment the experimental data, DFT calculations were carried. Molecular dockings were used to predict the interactions between, 1a with some biological targets. The binding free energies in the Plasmepsin II active sites indicated anti−malarial activity against P. falciparum in epidermal growth factor receptor (EGFR) inhibition, anti-inflammatory properties against human peroxiredoxin 5, and anticancer properties. With binding energies less than −5.00 kcal/mol, the results indicate that 1a is a potential drug target for anti-inflammatory, anti-malarial and anti-cancer properties.