It was synthesized nine polyoxygenated chalcones with a potential and safe use as antioxidant, antimicrobial and anti-inflammatory therapies. Chalcones obtained by Claisen-Schmidt condensation were studied as antioxidant, inhibitors of human 5-lipoxygenase, antifungal, antibacterial and antibiotic resistance modifiers. Two chalcones with catecholic moieties were able to strongly decrease the minimum inhibitory concentration (MIC) of methicillin against methicillin-resistant Staphylococcus aureus, increase the antiradical activity and significantly inhibit the human 5-lipoxygenase. Only one of these chalcones was active synergistically with methicillin. Chalcones with methoxyl substituents at different positions displayed the best activities against Cryptococcus neoformans. Only one chalcone showed good activity against the plant pathogenic bacteria Pseudomonas syringae whose half maximal inhibitory concentration (IC50) value (2.5 mu g mL(-1)) was similar to that observed with the antibiotic streptomycin (2.9 mu g mL(-1)). These simple chalcones have safe potential uses in antioxidant, antimicrobial and anti-inflammatory therapies.
Enone– and Chalcone–Chloroquinoline Hybrid Analogues: In Silico Guided Design, Synthesis, Antiplasmodial Activity, in Vitro Metabolism, and Mechanistic Studies
作者:Eric M. Guantai、Kanyile Ncokazi、Timothy J. Egan、Jiri Gut、Philip J. Rosenthal、Ravi Bhampidipati、Anitha Kopinathan、Peter J. Smith、Kelly Chibale
DOI:10.1021/jm200149e
日期:2011.5.26
metabolism. These analogues were synthesized and found to exhibit notable in vitro antimalarial activity. Compounds 25 and 27 were the most active of the analogues. In vitro metabolism studies indicated susceptibility of the analogues to hepatic metabolism. There was also evidence of primary glucuronidation for analogues 24–27. Presumed cis–trans isomerism of 12, 22, and 23 under in vitro metabolism assay