Abstarct: Reaction of 6-methyl-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one and 1,2-dihydro benzo[e][1,2,4]triazine-3(4H)-thione with propargyl bromide, afforded 6-methyl-3-(prop-2-ynylthio)-1,2,4-triazin-5(4H)-one and 3-(prop-2-ynylthio)-1,4-dihydrobenzo[e] [1,2,4]triazine respectively. Treatment of these prepared compounds with aromatic azides in the presence of copper(ІІ)acetate and sodium ascorbate in DMF or EtOH produced new derivative of 1,2,3-triazole-lixnked 1,2,4-triazine and 1,2,4-benzotriazine with good-to-high yields. In continue novel 1,2,3-triazole beased on the mention heterocyclic scaffolds were prepared using aliphatic halides, sodium azide and realated acetylenic compounds via copper-catalyzed click reaction.