Abstract:
:A series of aminothiazolyl norfloxacin analogues as a new type of potential antimicrobial agents were synthesized and screened for their antimicrobial activities. Most of the prepared compounds exhibited excellent inhibitory efficiencies. Especially, norfloxacin analogue II-c displayed superior antimicrobial activities against K. pneumoniae and C. albicans with MIC values of 0.005 and 0.010 mM to reference drugs, respectively. This compound not only showed broad antimicrobial spectrum, rapid bactericidal efficacy and strong enzymes inhibitory potency including DNA gyrase and chitin synthase (CHS), low toxicity against mammalian cells and no obvious propensity to trigger the development of bacterial resistance, but also exerted efficient membrane permeability, and could effectively intercalate into K. pneumoniae DNA to form a steady supramolecular complex, which might block DNA replication to exhibit their powerful antimicrobial activity. Quantum chemical studies were also performed to explain the high antimicrobial activities. Molecular docking showed that compound II-c could bind with gyrase-DNA and topoisomerase IV-DNA through hydrogen bonds and π-π stacking.
journal_name
Eur J Med Chemjournal_title
European journal of medicinal chemistryauthors
Wang LL,Battini N,Bheemanaboina RRY,Zhang SL,Zhou CHdoi
10.1016/j.ejmech.2019.01.072subject
Has Abstractpub_date
2019-04-01 00:00:00pages
105-123eissn
0223-5234issn
1768-3254pii
S0223-5234(19)30092-3journal_volume
167pub_type
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