Results 11 to 20 of about 14,027,089 (269)
Regioselective Three-Component Reaction of Pyridine N-Oxides, Acyl Chlorides, and Cyclic Ethers [PDF]
Organic Letters, 2017 A novel three-component reaction of pyridine N-oxides, acyl chlorides, and cyclic ethers is described. Treatment of an electron-deficient pyridine N-oxide with an acyl chloride in the presence of a cyclic ether at 25-50 °C leads to a substituted pyridine as a single regioisomer in up to 58% isolated yield.
Jones, D. Heulyn +4 more
openaire +6 more sources
A mild method for electrochemical reduction of Heterocyclic N-Oxides
, 2020 Deoxygenation of heteroaromatic N-oxides is commonly accomplished using chemical or enzymatic methods. In this work, we report on an expedient protocol for electrochemical reduction of pyridine N-oxide derivatives under mild conditions.
Yasuaki Fukazawa (6804722) +2 more
core +6 more sources
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
Molecules, 2023 A rhodium(II)-catalyzed reaction of cyclic nitronates (5,6-dihydro-4H-1,2-oxazine N-oxides) with vinyl diazoacetates proceeds as a [3+3]-annulation producing bicyclic unsaturated nitroso acetals (4a,5,6,7-tetrahydro-2H-[1,2]oxazino[2,3-b][1,2]oxazines ...
Yulia A. Antonova +3 more
doaj +1 more source
Energetic and Fluorescent Azole-Fused 4‑Amino-1,2,3-triazine-3-N-oxides
, 2019 Nitrogen-rich heterocyclic fused molecules are of considerable significance in the fields of synthetic and materials chemistry. Here, an efficient strategy for the synthesis of azole fused 4-amino-1,2,3-triazine N-oxides (4-6) via the diazotization ...
Jean’ne M. Shreeve (1267290) +3 more
core +5 more sources
Bacterial reduction of N-oxides of tobacco- specific nitrosamines (TSNA) [PDF]
, 1996 1 Contrary to established metabolic pattern, a recent investigation of NNK metabolism produced in rat urine higher levels of 4-(methylnitrosamino)-1-(3-pyridyl)-1- butanone (NNK) and 4-(methylnitrosamino)-1-(3-pyri dyl)-1-butanol (NNAL) than their N ...
Atawodi, SE, Richter, E.
core +1 more source
New Conjugated Benzothiazole-N-oxides: Synthesis and Biological Activity
Molecules, 2009 Eleven new 2-styrylbenzothiazole-N-oxides have been prepared by aldol – type condensation reactions between 2-methylbenzothiazole–N-oxide and para-substituted benzaldehydes.
Pavlína Foltínová +3 more
doaj +1 more source
Rhodium-Based Catalysts: An Impact of the Support Nature on the Catalytic Cyclohexane Ring Opening
Nanomaterials, 2023 Because of the growing demand for high-quality fuels, the light cycle oil fraction improvement including cetane number improvement is important. The main way to reach this improvement is the ring opening of cyclic hydrocarbons, and a highly effective ...
Kristina E. Kartavova +10 more
doaj +1 more source
Study Reactions of acetylenic amine N-Oxidewith reactive Halides [PDF]
مجلة جامعة الانبار للعلوم الصرفة, 2012 new acetylenic amine derived from cyclic secondary amines such as piperidine were synthesized , these amine were oxidized with m-chloroper benzoic acid to the corresponding N-Oxides.
Omar H. Shehab
doaj +1 more source
On the catalytic behavior of copper toward oxygen reduction reaction in alkaline solution [PDF]
شیمی کاربردی روز, 2013 The kinetic and mechanistic aspects of the oxygen reduction reaction as well as the electrocatalytic effect of copper surface in alkaline solution were studied by cyclic voltammetry and rotating disk electrode technique. In the potential range of -0.4 to
Ali Arab, Fereydoon Gobal
doaj +1 more source