Results 1 to 10 of about 81,546 (283)

Cyclic voltammetry of some quinoxaline di-N-oxides and quinoxalines in dimethylformamide [PDF]

Electrochimica Acta, 1992
Abstract The first cathodic reductions of two series of substituted quinoxaline di- N -oxides and quinoxalines in dimethylformamide were measured. The effect of substituent on these reductions is reported and reversibility is discussed.
James R Ames
exaly   +5 more sources

Regioselective Reaction of HeterocyclicN-Oxides, an Acyl Chloride, and Cyclic Thioethers [PDF]

The Journal of Organic Chemistry, 2018
Treatment of electron deficient pyridine N-oxides with 4-nitrobenzoyl chloride and a cyclic thioether in the presence of triethylamine leads to the corresponding 2-functionalized product in up to a 74% isolated yield. The transformation can also be accomplished with alternative nitrogen containing heterocycles, including quinolines, pyrimidines, and ...
Frei, Przemysslaw, Jones, D. Heulyn, Kay, Steven T., McLellan, Jayde A., Johnston, Blair F., Kennedy, Alan R., Tomkinson, Nicholas C. O.   +6 more
openaire   +8 more sources

Metal-Free Eliminative C-H Arylthiolation of 2H-Imidazole N-Oxides with Thiophenols [PDF]

Chemistry, 2023
A synthetic strategy based on reactions of cyclic imine oxides, namely 2H-imidazole 1-oxides, with thiophenols mediated by acetyl chloride was successfully applied as a convenient tool to obtain a series of novel azaheterocyclic molecules, including ...
Egor A. Nikiforov, Nailya F. Vaskina, Timofey D. Moseev, Mikhail V. Varaksin, Valery N. Charushin, Oleg N. Chupakhin   +5 more
doaj   +3 more sources

Synthesis of isoquinoline N-oxides via direct annulation with cyclic dicarbonyls

Results in Chemistry
An efficient Rh(III)-catalyzed, regioselective oxidative annulation of substituted aryl ketoximes with cyclic 1,3-dicarbonyl compounds for the divergent synthesis of polysubstituted isoquinoline N-oxides is described.
Xin Chen, XinYing Li, Xin Huang, Yuehong Zou, Qingqing Nie, Jinquan Zhang, Liping Chen, Ziyan Meng   +7 more
doaj   +2 more sources

Effects of nitrogen, sulphur, and temperature treatments on the spectral, structural, and electrochemical characteristics of graphene oxide for energy storage applications

Carbon Trends, 2023
The structural and surface modifications have been studied on the hydrothermally Nitrogen (N) and Sulphur (S) doped and thermally reduced at 350 °C nitrogen-doped, nitrogen-sulfur-doped graphene oxides.
G. Vignesh, P. Devendran, N. Nallamuthu, S. Sudhahar, P. Senthil Kumar, M. Krishna Kumar   +5 more
doaj   +1 more source

Role of non-covalent interactions at the oxidation of 2,5-di-Me-pyrazine-di-N-oxide at glassy carbon, single-walled and multi-walled carbon nanotube paper electrodes

Carbon Trends, 2021
Recently in our work it was shown that the catalytic efficiency of organic compound oxidation in the presence of electrochemically generated radical cations of aromatic di-N-oxides was increased several times using single-walled (SWCNT) or multi-walled ...
S.I. Kulakovskaya, A.V. Kulikov, T.S. Zyubina, A.S. Zyubin, D.V. Konev, L.N. Sviridova, E.V. Stenina, A.G. Ryabenko, E.V. Zolotukhina   +8 more
doaj   +1 more source

Synthesis of Sterically Shielded Nitroxides Using the Reaction of Nitrones with Alkynylmagnesium Bromides

Molecules, 2022
Sterically shielded nitroxides, which demonstrate high resistance to bioreduction, are the spin labels of choice for structural studies inside living cells using pulsed EPR and functional MRI and EPRI in vivo.
Sergey A. Dobrynin, Mark M. Gulman, Denis A. Morozov, Irina F. Zhurko, Andrey I. Taratayko, Yulia S. Sotnikova, Yurii I. Glazachev, Yuri V. Gatilov, Igor A. Kirilyuk   +8 more
doaj   +1 more source

5-Aryl-2-(3,5-dialkyl-4-hydroxyphenyl)-4,4-dimethyl-4H-imidazole 3-Oxides and Their Redox Species: How Antioxidant Activity of 1-Hydroxy-2,5-dihydro-1H-imidazoles Correlates with the Stability of Hybrid Phenoxyl–Nitroxides

Molecules, 2020
Cyclic nitrones of the imidazole series, containing a sterically hindered phenol group, are promising objects for studying antioxidant activity; on the other hand, they can form persistent hybrid phenoxyl–nitroxyl radicals (HPNs) upon oxidation.
Svetlana A. Amitina, Elena V. Zaytseva, Natalya A. Dmitrieva, Alyona V. Lomanovich, Natalya V. Kandalintseva, Yury A. Ten, Ilya A. Artamonov, Alexander F. Markov, Dmitrii G. Mazhukin   +8 more
doaj   +1 more source

N-Dopant-Mediated Growth of Metal Oxide Nanoparticles on Carbon Nanotubes

Nanomaterials, 2021
Metal oxide nanoparticles supported on heteroatom-doped graphitic surfaces have been pursued for several decades for a wide spectrum of applications. Despite extensive research on functional metal oxide nanoparticle/doped carbon nanomaterial hybrids, the
Jin Ah Lee, Won Jun Lee, Joonwon Lim, Sang Ouk Kim   +3 more
doaj   +1 more source

Recent Applications of Quinolinium Salts in the Synthesis of Annulated Heterocycles

SynOpen, 2022
Quinoline derivatives are frequently found in natural products and biologically active compounds; however, construction of quinoline fused polyheterocycles is a challenging goal in synthetic organic chemistry.
Suven Das
doaj   +1 more source