Results 1 to 10 of about 31,395 (235)

Electroreductive Intermolecular Coupling of 4‑Quinolones with Benzophenones: Synthesis of 2‑Substituted 4‑Quinolones [PDF]

open access: yesACS Omega, 2019
The electroreductive coupling of 1-alkoxycarbonyl-4-quinolones with benzophenones in the presence of trimethylsilyl chloride gave adducts reacted at the 2-position of 4-quinolones as trimethylsilyl ethers. The adducts were transformed to 2-(diarylhydroxymethyl)-4-quinolones.
Naoki Kise   +3 more
doaj   +6 more sources

Synthetic approach to 2-alkyl-4-quinolones and 2-alkyl-4-quinolone-3-carboxamides based on common β-keto amide precursors [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2023
β-Keto amides were used as convenient precursors to both 2-alkyl-4-quinolones and 2-alkyl-4-quinolone-3-carboxamides. The utility of this approach is demonstrated with the synthesis of fourteen novel and four known quinolone derivatives, including ...
Yordanka Mollova-Sapundzhieva   +3 more
doaj   +2 more sources

Hydrogen Bond Assisted Three-Component Tandem Reactions to Access N-Alkyl-4-Quinolones [PDF]

open access: yesMolecules, 2023
Hydrogen-bonding catalytic reactions have gained great interest. Herein, a hydrogen-bond-assisted three-component tandem reaction for the efficient synthesis of N-alkyl-4-quinolones is described.
Huanhuan Liu   +8 more
doaj   +2 more sources

Bacterial Alkyl-4-quinolones: Discovery, Structural Diversity and Biological Properties [PDF]

open access: yesMolecules, 2020
The alkyl-4-quinolones (AQs) are a class of metabolites produced primarily by members of the Pseudomonas and Burkholderia genera, consisting of a 4-quinolone core substituted by a range of pendant groups, most commonly at the C-2 position. The history of
Muhammad Saalim   +2 more
doaj   +2 more sources

Synthesis and Antibacterial Evaluation of a New Series of <em>N</em>-Alkyl-2-alkynyl/(<em>E</em>)-alkenyl-4-(1<em>H</em>)-quinolones [PDF]

open access: goldMolecules, 2012
To gain further insight into the structural requirements of the aliphatic group at position 2 for their antimycobacterial activity, some <em>N</em>-alkyl-4-(1<em>H</em>)-quinolones bearing position 2 alkynyls with various chain ...
Abraham Wube   +8 more
doaj   +2 more sources

Potentials of N-(2, 4-dinitro-1-naphthyl)-p-toluenesulphonamide and 2, 4-dinitro-1-naphthol as novel charge transfer acceptors in pharmaceutical analysis of some quinolones and cephalosporins [PDF]

open access: diamondFuture Journal of Pharmaceutical Sciences, 2022
Background Quinolones and cephalosporins are antibiotic agents with activity against Gram-positive and Gram-negative bacteria. They contain chromophores and amine groups which are electron-rich centres capable of donating electrons to electron-deficient ...
O. E. Umoh, O. A. Adegoke, D. E. Effiong
doaj   +2 more sources

Unravelling the Genome-Wide Contributions of Specific 2-Alkyl-4-Quinolones and PqsE to Quorum Sensing in Pseudomonas aeruginosa. [PDF]

open access: goldPLoS Pathog, 2016
Rampioni G   +9 more
europepmc   +3 more sources

Essential Guide of Analysis Methods Applied to Silver Complexes with Antibacterial Quinolones [PDF]

open access: yesAdvanced Pharmaceutical Bulletin, 2018
To describe the chemical structure and characterize physico-chemical properties of organometallic complexes it is necessary to use a complex set of analysis methods. Thus, this review has been compiled as a relevant guide which includes the most commonly
Aura Rusu, Gabriel Hancu, Silvia Imre
doaj   +1 more source

Synthesis of Quinolones and Zwitterionic Quinolonate Derivatives with Broad-Spectrum Antibiotic Activity

open access: yesPharmaceuticals, 2022
Quinolones are one of the most extensively used therapeutic families of antibiotics. However, the increase in antibiotic-resistant bacteria has rendered many of the available compounds useless.
Beatriz Suay-García   +5 more
doaj   +1 more source

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