Results 61 to 70 of about 7,313 (206)
On the Reaction Mechanism of Nitrate Radical and DMPO in Non‐aqueous Photocatalytic Media
Chemistry – A European Journal, EarlyView.This work identifies 2‐oxo‐5,5‐dimethyl‐1‐pyrroline 1‐oxyl (DMPOX), formed via the selective oxidation of 5,5‐dimethyl‐1‐pyrroline N‐oxide (DMPO) by nitrate radicals (NO3•) in nonaqueous media, as a distinctive EPR fingerprint of NO3•. The DFT‐supported mechanism clarifies its formation pathway and highlights DMPOX detection as a robust tool for ...
Alessandro Gottuso +4 more
wiley +1 more source
Metabolic stability of superoxide adducts derived from newly developed cyclic nitrone spin traps [PDF]
, 2014 Reactive oxygen species are by-products of aerobic metabolism involved in the onset and evolution of various pathological conditions. Among them, the superoxide radical is of special interest as the origin of several damaging species such as H2O2 ...
Bézière, Nicolas +5 more
core +1 more source
The Canadian Journal of Chemical Engineering, EarlyView.Abstract The synthesis and characterization of an amphiphilic nitroxide to be used as a controlling agent in a nitroxide‐mediated living radical polymerization in aqueous dispersion media is presented. In the first stage of nitroxide synthesis (phthalimide protection), two reaction methods were employed: traditional and microwave.
Enrique García‐Leal +3 more
wiley +1 more source
Molecules, 2021 The molecular mechanism of the [3 + 2] cycloaddition reaction between C-arylnitrones and perfluoro 2-methylpent-2-ene was explored on the basis of DFT calculations. It was found that despite the polar nature of the intermolecular interactions, as well as
Katarzyna Mitka +3 more
doaj +1 more source
ESR study of the spin adducts of three analogues of DEPMPO substituted at C-4 or C-3 [PDF]
, 2014 In the research program of some new derivatives of spin-trap DEPMPO (5-diethoxyphosphoryl-5-methyl-1-pyrroline-N-oxide) leading to various radical adducts with photogenic ESR signals, three phosphorylated pyrroline-N-oxides were studied in spin trapping.
Chalier, Florence +4 more
core +3 more sources
Bis‐Furans: A Sustainable Source of Diverse Molecular Architectures
European Journal of Organic Chemistry, Volume 29, Issue 10, 9 March 2026.A concise synthetic route to diverse acyclic and heterocyclic compounds has been developed by combining hetero‐Diels–Alder reactions, DBU‐promoted ring openings, and Lewis base‐catalyzed annulations. Nitrosoalkenes reacted with furan derivatives to form 4a,7a‐dihydro‐4H‐furo[2,3‐e][1,2]oxazines, which underwent DBU‐promoted rearrangements to 6H‐1,2 ...
Ana L. Cardoso +2 more
wiley +1 more source
RuO4-mediated oxidation of secondary amines: Part 1. Are hydroxylamines main intermediates? [PDF]
Journal of the Serbian Chemical Society, 2016 The RuO4-catalyzed oxidation of secondary amines Bn-NH-CH2R (1a-b; R=H, Me) gave mainly amides, but minute amounts of nitrones PhCH=N(O)-CH2R (9a-b) and traces of Bn-N(OH)-CH2R (R=H, 4a) were also detected.
Florea Cristina A., Petride Horia
doaj +1 more source
Effect of pH on superoxide/ hydroperoxyl radical trapping by nitrones: an EPR/kinetic study
, 2008 International audienceThe pH dependence of the apparent rate constant kTap for O2-./HO2. trapping by four nitrones was examined. In each case, kinetic curves were obtained after treatment of EPR spectra of the spin adduct formed using both singular value
Lauricella, Robert Paul +1 more
core +3 more sources
A reactive nitrone-based organogel that self-assembles from its constituents in chloroform [PDF]
, 2016 The authors thank the EPSRC for funding (DTA studentship to JER, EP/K503162/1)The reversible reaction of an aldehyde with a hydroxylamine affords a nitrone which is capable of forming a stiff gel with chloroform at concentrations as low as 0.20 wt% (6 mM)
Philp, Douglas, Richards, Josh
core +1 more source
Advanced Sensor Research, Volume 5, Issue 3, March 2026.ABSTRACT Profluorescent nitroxides (PFNs) have established themselves as powerful tools for monitoring oxidative processes and subcellular redox dynamics by reactive oxygen species (ROS). Their characteristic “off–on” behavior arises from the efficient, proximity‐driven quenching of covalently bound fluorophores by paramagnetic nitroxide radicals ...
Haider N. Sultani +4 more
wiley +1 more source