Abstract
We have synthesized new hybrid class of indole bearing sulfonamide scaffolds (1–18) as α-glucosidase inhibitors.
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•New indole derivatives were designed and synthesized.•Several functional groups were endured.•Compound 16 was found as the effective and lead molecule.•Molecular docking study was presented to explain numerous key binding interactions.•Diabetic in vivo study was carried out to support in vitro study.
We have synthesized new hybrid class of indole bearing sulfonamide scaffolds (1–17) as α-glucosidase inhibitors. All scaffolds were found to be active except scaffold 17 and exhibited IC50 values ranging from 1.60 to 51.20 µM in comparison with standard acarbose (IC50 = 42.45 µM). Among the synthesized hybrid class scaffolds 16 was the most potent analogue with IC50 value 1.60 μM, showing many folds better potency as compared to standard acarbose. Whereas, synthesized scaffolds 1–15 showed good α-glucosidase inhibitory potential. Based on α-glucosidase inhibitory effect, Scaffold 16 was chosen due to highest activity in vitro for further evaluation of antidiabetic activity in Streptozotocin induced diabetic rats. The Scaffold 16 exhibited significant antidiabetic activity. All analogues were characterized through 1H, 13CNMR and HR MS. Structure-activity relationship of synthesized analogues was established and confirmed through molecular docking study.