Synthesis and Anticancer Evaluation of New Derivatives of 3-Phenyl-1,5-Dimethyl-1H-[1,2,4]Triazolo[4′,3′:1,2]Pyrimido[4,5-e][1,3,4]Oxadiazine

The synthesis of new derivatives of 3-phenyl-1,5-dimethyl-1H-[1,2,4]triazolo[4′,3′:1,2]pyrimido[4,5-e][1,3,4]oxadiazines 5a–e and 7a–e is described through heterocyclisation of hydrazino derivative (3) with aromatic aldehydes or carbon disulfide and alkyl halides. [(1,5-Dimethyl-3-phenyl-1H-[1,2,4]triazolo[4′,3′:1,2]pyrimido[4,5-e][1,3,4]oxadiazin-7-yl) sulfanyl]methyl cyanide was singled out to be tested on different cancer cell lines including HeLa, MCF-7, and HepG2. Malignant cells were cultured in DMEM medium and incubated with different concentrations of the titled compounds. Cell viability was quantified by MTT assay.