New antihyperglycemic, alpha-glucosidase inhibitory, and cytotoxic derivatives of benzimidazoles

Journal of Enzyme Inhibition and Medicinal Chemistry
Jaladi Ashok KumarB China Raju


Glycosidases play an important role in a wide range of physiological and pathological conditions, and have become potential targets for the discovery and development of agents useful for the treatment of diseases such as diabetes, cancer, influenza, and even AIDS. In this study, several benzimidazole derivatives were prepared from o-phenylenediamine and aromatic and heteroaromatic carboxaldehydes in very good yields, using PdCl2(CH3CN)2 as the most efficient catalyst. Synthesized compounds were assayed for their activity on yeast and rat intestinal alpha-glucosidase inhibition and cytotoxic activity against colon carcinoma cell line HT-29. Compound 3e exhibited 95.6% and 75.3% inhibition of yeast and rat intestinal alpha-glucosidase enzyme, while showing 74.8% cytotoxic activity against the HT-29 cell line at primary screening concentrations of 2.1 mM for yeast and rat intestinal alpha-glucosidase enzyme and 0.2 mM for cytotoxic activity against the HT-29 cell line, respectively. Compound 3c displayed 76% and 34.4% inhibition of yeast and rat intestinal alpha-glucosidase enzyme, and 80.4% cytotoxic activity against the HT-29 cell line at similar primary screening concentrations. The IC50 value for the most potent intestinal alp...Continue Reading


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