Abstract
Indolyl aryl sulfones (IASs) have been under investigation as HIV-1 non-nucleoside reverse transcriptase inhibitors (NNRTIs) since the discovery of Merck's compound l-737,126. This research work reports the synthesis of a novel series of indolyl aryl sulfonyl carboxamides (11 to 21 and 25 to 28) and their biological evaluation. Among the synthesized compounds, 15 (IC50 = 57.4 ± 10.1 µM) and 26 (IC50 = 34.0 ± 1.9 µM) demonstrated potent inhibitory activity in RNA-dependent DNA polymerization (RDDP) reactions. In addition, radical inhibition activity was performed by reacting the synthesized compounds against 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and it was observed that compounds 20 (IC50 = 8.2 ± 0.2 µM) and 21 (IC50 = 9.3 ± 0.5 µM) showed promising antioxidant properties. Additionally, Two-Dimensional Quantitative Structure Activity Relationship (2D-QSAR) and molecular docking studies were employed to provide insight into the molecular mechanism of RDDP inhibition.
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