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Synthesis and biological activity of novel amidino-substituted imidazo[4,5-b]pyridines

Imidazo-pyridines are important scaffold in organic and medicinal chemistry due to their promising biological activity. [1] Some of the derivatives have already found application in medicine, while many others are currently in clinical testing In this work, we have synthesized novel amidino-substituted derivatives of imidazo[4, 5-b]pyridine [2]. Main precursors for the synthesis of targeted derivatives were prepared by DMSO-mediated cyclization.[3] Unsubstituded amidines were prepared using lithium hexamethyldisilazane, while other were obtained by Pinner reaction.The structures of newly prepared compounds were confirmed by means of 1H and 13C NMR spectroscopy as well as MS spectrometry. All prepared compounds were evaluated for their antitumor activity in vitro on several human cancer cells as well as for their antiviral and antibacterial activity.

imidazo[4, 5-b]pyridines ; amidines ; biological evaluation

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