Abstract
Abstract9H fluoren containing indoline scaffolds were developed by coupling indoline amine with α‐carboxylic acid group of amino acids in the presence of the peptide coupling reagent hexafluorophosphate benzotriazole tetramethyluronium (HBTU). All eight (12a–12h) synthesized indoline scaffolds were analyzed for their potent antibacterial and antifungal activities. The antibacterial assay revealed that compounds 12a, 12b, and 12e have shown excellent activity against pathogenic strains Pseudomonas aeruginosa, Staphylococcus aureus, and Streptococcus pyogenes with minimum inhibitory concentration (MIC) values as low as between 25 and 125 μg/mL. The antifungal activity of all synthesized indoline scaffolds were moderate compared with used standard drugs. The molecular docking study of 12a, 12b, and 12e with various antibacterial target proteins from different bacterial strains revealed outstanding interactions which ultimately support antibacterial results.
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