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Wyświetlanie pozycji 21-30 z 110
Enzymatic Synthesis of a Novel Coumarin Aminophosphonates: Antibacterial Effects and Oxidative Stress Modulation on Selected E. coli Strains
(MDPI, 2023)
The objective of the present study was to evaluate the synergistic effect of two important pharmacophores, coumarin and -amino dimethyl phosphonate moieties, on antimicrobial activity toward selected LPS-varied E. coli ...
Magnetic Antiaromaticity─Paratropicity─Does Not Necessarily Imply Instability
(ACS Publications, 2023)
Magnetically induced ring currents are a conventional tool for the characterization of aromaticity. Dia- and paratropic currents are thought to be associated with stabilization (aromaticity) and destabilization (antiaromaticity), ...
Carboxylated Pillar[6]arene Emulates Pillar[5]arene in the Host–Guest Crystal Complexes and Shows Conformational Flexibility in the Solution/Gas Phase
(American Chemical Society, 2023)
Despite the thriving interest in the aqueous complexation properties of carboxylated pillar[6]arene, its solid state supramolecular chemistry has remained a mystery. Here, overcoming challenging crystallogenesis, we report ...
Realization of nitroaromatic chromophores with intense two-photon brightness
(Royal Society of Chemistry, 2023)
Strong fluorescence is a general feature of dipyrrolonaphthyridinediones bearing two nitrophenyl substituents. Methyl groups simultaneously being weakly electron-donating and inducing steric hindrance appear to be a key ...
Synthesis and Antimicrobial Activity of the Pathogenic E. coli Strains of p-Quinols: Additive Effects of Copper-Catalyzed Addition of Aryl Boronic Acid to Benzoquinones
(MDPI, 2023)
A mild and efficient protocol for the synthesis of p-quinols under aqueous conditions was developed. The pivotal role of additives in the copper-catalyzed addition of aryl boronic and heteroaryl boronic acids to benzoquinones ...
UV Light Is No Longer Required for the Photoactivation of 1,3,4- Oxadiazolines
(American Chemical Society, 2023)
Carbenes play a key role in a plethora of organic transformations. Although stabilized diazo carbonyl compounds predominate as a source of electrophilic carbenes, the hazardous nature of nonstabilized analogues calls for ...
Selective Approaches to α- and β-Arylated Vinyl Ethers
(Wiley, 2022)
We developed simple and efficient protocols for palladium-catalyzed regioselective a- and b-arylations of structurally diverse vinyl ethers. Both catalytic methods proceed under relatively mild reactions conditions ...
Pyridine N-oxides as HAT reagents for photochemical C–H functionalization of electron-deficient heteroarenes
(Royal Society of Chemistry, 2022)
Pyridine N-oxides have only recently marked their presence in the photocatalysis field, mainly serving as oxypyridinium salt precursors. Herein, their unique reactivity as a hydrogen atom transfer reagent in photochemical, ...
Porphyrins as Promising Photocatalysts for Red-Light-Induced Functionalizations of Biomolecules
(American Chemical Society, 2022)
Red-light enables deeper material penetration, which is important for biological applications and has consequences for chemical synthesis. Therefore, the search for new photocatalysts that absorb in this region is crucial. ...
Green-Emitting 4,5-Diaminonaphthalimides in Activity-Based Probes for the Detection of Thrombin
(American Chemical Society, 2022)
The natures of electron-donating groups as well as the bridge between them determine the fate of substituted 1,8-naphthalimide molecules in the excited state. An activity-based probe constructed from a selective peptide ...