Synthesis, Biological Evaluation and Docking Study of Mono- and Di-Sulfonamide Derivatives as Antioxidant Agents and Acetylcholinesterase Inhibitors.

Mono(M1-M5)- and di(DM1-DM5)-sulfonamide derivatives were synthesized by the reaction of 4-iodobenzenesulfonyl chloride compound and aniline derivatives in basic medium. The structures of sulfonamide derivatives were characterized by spectroscopic and X-ray diffraction methods. All compounds were screened for acetylcholinesterase (AChE) inhibitory studies and 2,2-diphenyl-1-picrylhydrazil (DPPH) radical scavenging activities. Among the compounds tested, compound M1 showed the best activity against both AChE (IC50 =42.09 μg/mL for AChE) and DPPH (IC50 =9.94 μg/mL for DPPH). By placing compounds at the active site of AChE, their binding energies and modes were determined. Docking studies were performed in order to investigate binding interaction between the synthesized compounds and AChE. The most active M1 compound showed its low CDOCKER energy (-65,834 kcal/mol).