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Synthesis and cytotoxic activity of novel poly-substituted imidazo[2,1-\(c\)][1,2,4]triazin-6-amines

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Abstract

A novel series of 3,4-diphenyl-7-(hetero)arylimidazo[2,1-\(c\)][1,2,4]triazin-6-amine derivatives were synthesized via three-component reaction of 5,6-diphenyl-1,2,4-triazin-3-amine, various aromatic aldehydes, and cyclohexyl isocyanide. All synthesized compounds were tested against HL60 (human promyelocytic leukemia), MOLT-4 (human T lymphoblastic leukemia), and MCF-7 (human breast adenocarcinoma) cell lines, as cytotoxic agents. The structure–activity relationships study revealed that the introduction of hydroxyl and methoxy groups on the 7-phenyl ring can modulate the cytotoxic activity of these compounds. Among the 7-aryl derivatives, 3-hydroxyphenyl and 3-hydroxy-4-methoxyphenyl derivatives (6h and 6o) were the most potent compounds against HL60 and MCF-7 cells (\(\hbox {IC}_{50}\hbox {s} = 9.8-20.4\;\upmu \)M). However, the replacement of the 7-aryl moiety with pyridyl or furan-2-yl resulted in compounds 6p or 6r with more promising cytotoxicity against MOLT-4 cell line (\(\hbox {IC}_{50}\) values 12.1 and 13.0 \(\upmu \)M, respectively). Also, the acridine orange/ethidium bromide staining assay in MCF-7 cells suggested that the cytotoxic activity of compound 6r occurs via apoptosis.

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Acknowledgments

This research was supported by grants from the Research Council of Tehran University of Medical Sciences and Iran National Science Foundation (INSF).

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Correspondence to Alireza Foroumadi.

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Akbarzadeh, T., Noushini, S., Taban, S. et al. Synthesis and cytotoxic activity of novel poly-substituted imidazo[2,1-\(c\)][1,2,4]triazin-6-amines. Mol Divers 19, 273–281 (2015). https://doi.org/10.1007/s11030-015-9566-6

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  • DOI: https://doi.org/10.1007/s11030-015-9566-6

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