In this paper, we report the synthesis of novel 1 H-pyrano[2,3- d]pyrimidine-2,4(3 H,5 H)-dione derivatives 5(a–j) by a facile multicomponent reaction. The structures of all the newly synthesized compounds were characterized by different spectroscopic techniques including infrared, nuclear magnetic resonance (1H and 13C) and mass spectral analysis. All the new compounds were assessed for their in vitro α-amylase and α-glucosidase enzyme inhibitory potential. The results of the assays revealed that all compounds showed different enzyme inhibition activities. The concentration required to inhibit enzyme activity is less in the case of α-glucosidases than for α-amylases, that is, the synthesized compounds are more potent in arresting α-glucosidase enzyme activity.
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