10.1007/s00044-011-9689-y
The research focuses on the synthesis and evaluation of new compounds derived from metronidazole and amino acids and their esters as potential antiparasitic agents. The synthesis involved a reaction between 2-(2-methyl-5-nitro-1H-imidazol-1-yl)acetic acid and various amino acid esters in the presence of N,N'-carbonyldiimidazole (CDI) and triethylamine (TEA), followed by hydrolysis with sodium hydroxide and acidification with hydrochloric acid to obtain the corresponding acids. The synthesized compounds were characterized using elemental analysis and spectroscopic techniques such as 1H-NMR, 13C-NMR, and mass spectrometry. The biological activity of these compounds was assessed through in vitro antiamoebic and antigiardial activity assays, as well as cytotoxicity tests on Hep-2 and Vero cell lines, with metronidazole serving as a standard drug for comparison. The study aimed to identify new derivatives with enhanced antiparasitic activity and lower cytotoxicity, which could contribute to overcoming drug resistance in pathogens.