The cyclization of 1,3-diaryl-2-azido-2-propen-1-ones with various alkynes in the presence of a catalytic amount of copper sulfate-sodium ascorbate in DMSO-water mixture under microwave irradiation led to the formation of (Z)-1,3-diaryl-2-(4-substituted-1H-1,2,3-triazol-1-yl)prop-2-en-1-ones. The structure and stereochemistry of the products have been elucidated by spectroscopic and single crystal X-ray analyses. All the newly synthesized compounds have been tested for their antibacterial activity against four strains of bacteria and found to have moderate to good inhibition.