Synthesis and structure of novel 1,2,4-triazole derivatives containing the 2,4-dinitrophenylthio group

Some novel 1,2,4-triazole derivatives containing the 2,4-dinitrophenylthio group have been synthesised in high yields by means of the reactions of 3-substituted-4-amino -1H-1,2,4-triazole-5(4H)-thiones or (E)-3-aryl-4-(benzylideneamino)-1H-1,2,4-triazole-5(4H)-thiones with 1-chloro-2,4- dinitrobenzene. The (E)-3-aryl-4-(benzylideneamino)-1H-1,2,4-triazole-5(4H)-thiones were prepared by the reaction of 4-amino-3-aryl-2H-1,2,4-triazole-3(4H)-thiones and diverse aromatic aldehydes. The 2, 4-dinitrophenyl group linked to the S atom, not to the N atom, was confirmed by the crystal structures. The structures of all the compounds were determined by elemental analysis, IR, MS, H-1 NMR and C-13 NMR.