Abstract
An efficient one pot condensation of naphthols (1), 2,5-disubstituted indole-3-carboxaldehydes (2), and secondary amines (3) has been achieved using dichloromethane as a solvent, stirring at room temperature. Some of the new [(disubstituted amino)(5-substituted 2-phenyl-1H-indol-3-yl)methyl]naphthalene-ols (4) derivatives were prepared in good yields. The significant features of this method are simple work-up procedure, inexpensive nontoxic solvent, shorter reaction times, and excellent product yields. The structures of newly synthesized compounds (4a–r) are confirmed by their elemental analysis, FTIR, 1H and 13C NMR, and mass spectral data. These compounds were screened for their in vitro antioxidant, antimicrobial, antitubercular, and anticancer activities. Among the synthesized compounds (4a–r), the compound 4e exhibited highest activity for radical scavenging and ferric ions reducing antioxidant power activities; compounds 4b, 4h, and 4k showed good metal chelating activity. Compounds 4n and 4q showed excellent antimicrobial activities with MIC value 08 µg/mL against tested strains. Compounds 4h, 4k, 4n, and 4q exhibited promising antitubercular activity with MIC value 12.5 µg/mL. Compounds 4k and 4q exhibited 100% cell lysis at concentration 10 µg/mL against MDA-MB-231 (human adenocarcinoma mammary gland) cell lines.
Highlights
The search and evaluation of chemical compounds and their derivatives with a specific pharmacological activity are a demanding task in the drug discovery process
Most antioxidants prevent down low-density lipoproteins (LDL) oxidation in cell-free systems and delay the formation of atherosclerotic lesions in animal models for atherosclerosis such as apo E-/mice [5]
Discrepancies exist about their efficiency against atherosclerosis in humans, this resulting at least in part from the bioavailability within the plaque, their chemical nature, and inability to scavenge reactive carbonyl compounds (RCCs) once adducts are formed on proteins [6]
Summary
The search and evaluation of chemical compounds and their derivatives with a specific pharmacological activity are a demanding task in the drug discovery process. Most antioxidants prevent down low-density lipoproteins (LDL) oxidation in cell-free systems and delay the formation of atherosclerotic lesions in animal models for atherosclerosis such as apo E-/mice [5]. Discrepancies exist about their efficiency against atherosclerosis in humans, this resulting at least in part from the bioavailability within the plaque, their chemical nature, and inability to scavenge reactive carbonyl compounds (RCCs) once adducts are formed on proteins [6]. About 0.35 million people living with HIV die from TB Another major problem in TB therapy is the fact that Mtb became more resistant to the antituberculosis (anti-TB) drugs [9].
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