نتایج جستجو برای: substituted piperazinyl quinolones
تعداد نتایج: 43175 فیلتر نتایج به سال:
A practical approach for preparing 3,4-fused 2-quinolones has been disclosed. The Rh( iii )-catalyzed highly selective alkenyl C–H activation/annulation of 4-amino-2-quinolones was achieved via an unprecedented reversible alkyne insertion.
The continued proliferation of malaria throughout temperate and tropical regions of the world has promoted a push for more efficacious treatments to combat the disease. Unfortunately, more recent remedies such as artemisinin combination therapies have been rendered less effective due to developing parasite resistance, and new drugs are required that target the parasite in the liver to support t...
Enoxacin, an antimicrobial fluoroquinolone with a 7-piperazinyl-1, 8-naphthyridine skeleton, is a potent inhibitor of cytochrome P-450-mediated theophylline metabolism. The present study was designed to clarify, using seven enoxacin derivatives, the molecular characteristics of the fluoroquinolone responsible for the inhibition. Three derivatives with methyl-substituted 7-piperazine rings inhib...
Fluoroquinolones have been a class of important synthetic antimicrobial agents broadly and effectively used in clinic for infectious diseases. In this study, the synthesis of a range of fluoroquinolone derivatives with 4-(carbopiperazin-1-yl)piperazinyl moieties at the C7 position and their inhibition of bacterial pathogens commonly disseminated in hospital environment were described. The resul...
The quinolone class of antimicrobial agents has generated considerable interest since its discovery >40 years ago. Substantial progress has been made in our understanding of the molecular mechanisms of the action of quinolones against pathogenic bacteria, the induction of resistance to quinolones in these organisms, and the potential of each quinolone compound to induce toxicity in treated pati...
The comparative effectiveness and safety of macrolides, quinolones and amoxicillin/clavulanate (A/C) for the treatment of patients with acute bacterial exacerbation of chronic bronchitis (ABECB) was evaluated in the present study. PubMed, Current Contents and the Cochrane Central Register of Controlled Trials were searched to identify relevant randomised controlled trials (RCTs). In total, 19 R...
Six 4-substituted quinolones 6-8, which bear an ω-iodoalkyl chain, were prepared and subjected to reductive radical cyclisation conditions employing BEt(3)/O(2) as the initiator and either Bu(3)SnH or TMS(3)SiH as hydride source. 4-(4-Iodobutyl)-quinolone (6a) and 4-(3-iodopropylthio)-quinolone (8a) gave the respective 6-endo-cyclisation products in good yields. 4-(3,3-Dimethyl-4-iodobutyl)-qui...
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