Results 61 to 70 of about 24,259 (231)

Photocatalytic Vanadium‐Mediated Amination of Benzene With Hydroxylamine

Chemistry – A European Journal, EarlyView.
Photochemical activation of N‐phenylphenothiazine (PPT) enables a selective direct benzene amination with hydroxylamine in the presence of various vanadium catalysts under mild reaction conditions. Spectroscopic and kinetic analyses identify a key vanadium(IV)‐hydroxylamine intermediate, elucidate the crucial roles of the acidic medium, the ...
Dana Králová, Maximilian Philipp, Matthias Schmalzbauer, Thilo Reiter, Bernd Schäfer, Ruth M. Gschwind, Burkhard König   +6 more
wiley   +1 more source

Second harmonic generation and photochromic grating in polyurethane films containing diazo isoxazole chromophore [PDF]

, 2008
The chromophoric intermediate: 2,2′-({4-[(E)-(5-methylisoxazol-3-yl)diazenyl]phenyl}-imino)diethanol was used in polyaddition reaction with di-isocyanate to obtain a new polyurethane polymeric material showing nonlinear optical and photochromic ...
E. Ortyl, J.M. Nunzi, K. Marański, R. Barille, S. Ahmadi-Kandjani, S. Dabos, S. Kucharski, S.W. Chan   +7 more
core   +4 more sources

Bayesian Optimization of Solvent‐Free Thermal Amidation via Reactive Extrusion

Chemistry – A European Journal, EarlyView.
Thermal amidation between a carboxylic acid and an amine was successfully conducted in an extruder in the absence of solvent, coupling agent, or catalyst, relying on an adapted Bayesian Optimization protocol. Active pharmaceutical ingredient moclobemide was synthesized on a larger scale, achieving excellent yield and low Process Mass Intensity (PMI ...
Matthieu Lavayssiere, Xavier Bantreil, Frédéric Lamaty   +2 more
wiley   +1 more source

4-(4-Chlorophenyl)-5-phenylisoxazole

Acta Crystallographica Section E, 2009
The title compound, C15H10ClNO, is a functionalized isoxazole with a chlorophenyl and a phenyl substitutent. The mean plane of the isoxazole ring is inclined to those of the two benzene ring mean planes by 38.32 (16) and 43.91 (18 ...
M. Krishnaiah, R. Ravi Kumar, Thanzaw Oo, Pho Kaung   +3 more
doaj   +1 more source

Fathoming the kynurenine pathway in migraine: why understanding the enzymatic cascades is still critically important [PDF]

, 2015
Kynurenine pathway, the quantitatively main branch of tryptophan metabolism, has been long been considered a source of nicotinamide adenine dinucleotide, although several of its products, the so-called kynurenines, are endowed with the capacity to ...
CURTO, MARTINA, FAZIO, FRANCESCO, Lionetto, L, MARTELLETTI, Paolo, Mitsikostas, Dd   +4 more
core   +1 more source

Expedient Discovery of a Metallaphotoredox Cyanomethylation for Synthesizing α‐Aryl Nitriles

Chemistry – A European Journal, EarlyView.
A metallaphotoredox cyanomethylation reaction has been developed for the synthesis of valuable α‐aryl nitrile intermediates. The methodology was successfully applied to diverse medicinally‐relevant substrates, providing an expedient route to anti‐cancer Senexin compounds, while also removing the need for toxic cyanide reagents. The mechanism was probed
Gemma C. Cook, Blandine McKay, Craig Jamieson, Lee J. Edwards, Charlotte Harriman, Zackary S. Read, Simon T. Bate   +6 more
wiley   +1 more source

1-(3-p-Tolylisoxazol-5-yl)cyclohexanol

Acta Crystallographica Section E, 2009
The title compound, C16H19NO2, contains two molecules in the asymmetric unit. Each molecule is composed of three interconnected rings, two essentially planar rings, viz.
Lahcen El Ammari, Mohamed Soufiaoui, Rachid Benhida, Khalid Bougrin, Ouafaa Khalil   +4 more
doaj   +1 more source

Crystal structure and Hirshfeld surface analysis of (Z)-3-methyl-4-(thiophen-2-ylmethylidene)isoxazol-5(4H)-one

Acta Crystallographica Section E: Crystallographic Communications, 2021
The title compound, C9H7NO2S crystallizes with two independent molecules (A and B) in the asymmetric unit with Z = 8. Both molecules are almost planar with a dihedral angle between the isoxazole and thiophen rings of 3.67 (2)° in molecule A and 10.00 (1)
Rima Laroum, Assia Benouatas, Noudjoud Hamdouni, Wissame Zemamouche, Ali Boudjada, Abdelmadjid Debache   +5 more
doaj   +1 more source

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

Chemistry – A European Journal, EarlyView.
Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis, Kyriakos D. Nikopoulos, Ioannis N. Lykakis   +2 more
wiley   +1 more source

3-Benzyl-5-methyl-1,2-benzoxazole 2-oxide

Acta Crystallographica Section E, 2012
In the title compound, C15H13NO2, the isoxazole unit and the attached benzene ring are almost coplanar, making a dihedral angle of 1.42 (8)°.
G. Anuradha, Vasuki Gopalsamy, A. Veera Reddy, G. Laxminarasimhulu   +3 more
doaj   +1 more source