Hetarylcoumarins: Synthesis and biological evaluation as potent α-glucosidase inhibitors

In search of better alpha-glucosidase inhibitors, a series of novel hetarylcoumarins (3a-3j) were designed and synthesized through a facile multicomponent route where p-toluenesulfonic acid (PTSA) was explored as an efficient catalyst. These new scaffolds were further evaluated for their alpha-glucosidase inhibition potentials. All the derivatives exhibited good to excellent results which were comparable or even better than of standard drug acarbose. Of these compounds, a dihalogenated compound 3f was found to be the most effective one with IC50: 2.53 +/- 0.002 mu M. Molecular docking has predicted the plausible binding interactions of compounds 3f, 3g and 3j with alpha-glucosidase. (C) 2017 Elsevier Inc. All rights reserved.