2-Aryl benzimidazoles: Synthesis, In vitro α-amylase inhibitory activity, and molecular docking study

Despite of many diverse biological activities exhibited by benzimidazole scaffold, it is rarely explored for the alpha-amylase inhibitory activity. For that purpose, 2-aryl benzimidazole derivatives 1-45 were synthesized and screened for in vitro alpha-amylase inhibitory activity. Structures of all synthetic compounds were deduced by various spectroscopic techniques. All compounds revealed inhibition potential with IC50 values of 1.48 +/- 038-2.99 +/- 0.14 mu M, when compared to the standard acarbose (IC50 = 1.46 +/- 0.26 mu M). Limited SAR suggested that the variation in the inhibitory activities of the compounds are the result of different substitutions on aryl ring. In order to rationalize the binding interactions of most active compounds with the active site of alpha-amylase enzyme, in silico study was conducted. (C) 2018 Elsevier Masson SAS. All rights reserved.