Synthesis and Biological Studies of Novel Biphenyl-3,5-dihydro-2H-thiazolopyrimidines Derivatives

Abstract

A new series of ethyl 2-(4-substitutedbenzylidene)-5-(3'-(ethoxycarbonyl)biphenyl-4-yl)-7-methyl-3-oxo-3,5-dihydro-2H-thiazolo[3,2-a]pyrimidine-6-carboxylate derivatives (<TEX>$\mathbf{8a-j}$</TEX>) were synthesized. The newly synthesized compounds were characterized by <TEX>$\mathbf{IR}$</TEX>, <TEX>$^1\mathbf{H}$</TEX> <TEX>$\mathbf{NMR}$</TEX>, <TEX>$^{13}\mathbf{C}$</TEX> <TEX>$\mathbf{NMR}$</TEX>, <TEX>$\mathbf{LCMS}$</TEX> <TEX>$\mathbf{mass}$</TEX> and <TEX>$\mathbf{C}$</TEX>, <TEX>$\mathbf{H}$</TEX>, <TEX>$\mathbf{N}$</TEX> analyses. All newly synthesized compounds were screened for their In vitro antioxidant activity (Scavenging of hydrogen peroxide, Scavenging of nitric oxide radical, and Lipid peroxidation inhibitory activity), antibacterial (Escheria coli, Pseudonmonas aeruginosa (gram-negative bacteria), Bacillus subtillis, Staphylococcus aureus (gram-positive bacteria)) and antifungal (Candida albicans Aspergillus niger) studies.