Synthesis and Cytotoxic Activity of Novel Poly-Substituted Imidazo[2,1-C][1,2,4]Triazin-6-Amines Publisher Pubmed



Akbarzadeh T^{1, 2} ; Noushini S¹ ; Taban S¹ ; Mahdavi M¹ ; Khoshneviszadeh M³ ; Saeedi M² ; Emami S⁴ ; Eghtedari M⁵ ; Sarrafi Y⁵ ; Safavi M⁶ ; Divsalar K⁷ ; Moshafi MH⁷ ; Asadipour A⁷ ; Sabourian R² Show All Authors Show Affiliations
Source: Molecular Diversity Published:2015

Abstract

A novel series of 3,4-diphenyl-7-(hetero)arylimidazo[2,1-$$c$$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 (IC50s = 9.8-20.4μM). 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 (IC50 values 12.1 and 13.0 μM, respectively). Also, the acridine orange/ethidium bromide staining assay in MCF-7 cells suggested that the cytotoxic activity of compound 6r occurs via apoptosis. © 2015, Springer International Publishing Switzerland.