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Design, Synthesis, Molecular Docking, and in Vitro Α-Glucosidase Inhibitory Activities of Novel 3-Amino-2,4-Diarylbenzo[4,5]Imidazo[1,2-A]Pyrimidines Against Yeast and Rat Α-Glucosidase Publisher Pubmed



Peytam F1 ; Takalloobanafshi G2 ; Saadattalab T3 ; Norouzbahari M4 ; Emamgholipour Z3 ; Moghimi S1 ; Firoozpour L1 ; Bijanzadeh HR5 ; Faramarzi MA6 ; Mojtabavi S6 ; Rashidiranjbar P2 ; Karima S7 ; Pakraad R7 ; Foroumadi A1, 3
Authors

Source: Scientific Reports Published:2021


Abstract

In an attempt to find novel, potent α-glucosidase inhibitors, a library of poly-substituted 3-amino-2,4-diarylbenzo[4,5]imidazo[1,2-a]pyrimidines 3a–ag have been synthesized through heating a mixture of 2-aminobenzimidazoles 1 and α-azidochalcone 2 under the mild conditions. This efficient, facile protocol has been resulted into the desirable compounds with a wide substrate scope in good to excellent yields. Afterwards, their inhibitory activities against yeast α-glucosidase enzyme were investigated. Showing IC50 values ranging from 16.4 ± 0.36 µM to 297.0 ± 1.2 µM confirmed their excellent potency to inhibit α-glucosidase which encouraged us to perform further studies on α-glucosidase enzymes obtained from rat as a mammal source. Among various synthesized 3-amino-2,4-diarylbenzo[4,5]imidazo[1,2-a]pyrimidines, compound 3k exhibited the highest potency against both Saccharomyces cerevisiae α-glucosidase (IC50 = 16.4 ± 0.36 μM) and rat small intestine α-glucosidase (IC50 = 45.0 ± 8.2 μM). Moreover, the role of amine moiety on the observed activity was studied through substituting with chlorine and hydrogen resulted into a considerable deterioration on the inhibitory activity. Kinetic study and molecular docking study have confirmed the in-vitro results. © 2021, The Author(s).
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