Synthesis and antibacterial activity of 4,4′-(aryl or alkyl methylene)-bis(1H-pyrazol-5-ol) derivatives
摘要:
A rapid, improved, and environmentally benign synthesis of 4,4'-aryl or alkyl methylene-bis(1H-pyrazol-5-ols) has been accomplished by tandem Knoevenagel-Michael reaction of 1-aryl-3-alkyl-1H-pyrazol-5-ol with various aldehydes catalyzed by ammonium acetate. All the synthesized compounds 3a-v were evaluated in vitro for their antibacterial activity against Pseudomonas aeruginosa, Xanthomonas protophormiae, Bacillus licheniformis, and Staphylococcus aureus. Among the tested compounds, compounds with trifluromethyl group show excellent antibacterial activity.
O-methylated derivatives resembling celecoxib structure and evaluate biological activities of obtained compounds. Methods: In vitro (permeability) and in vivo (anti-inflammatory and analgesicactivities, acute toxicity, hyperalgesia, antipyreticactivity, “open field” test) experiments. To suggest the mechanism of biological activity, molecular docking of the synthesized compounds was carried out into the
One pot solvent-free synthetic method is developed for the synthesis of novel pyrano[2,3-c]pyrazole analogs. Cytotoxicity experiments conducted against a pair of cancerous, non-cancerous lung cell lines, and a cervical cell line is described. These compounds are selectively toxic against cancer cells and not normal cells. Molecular mechanism is established for the mode of DNA binding of these compounds using electrochemical and proton NMR methods.