Bibliografías temáticas / Radicaux carbamoyles

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Literatura académica sobre el tema "Radicaux carbamoyles"

Autor: Grafiati
Publicado: 25 de enero de 2025
Última modificación: 31 de julio de 2025

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Artículos de revistas sobre el tema "Radicaux carbamoyles"

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Safiulina, A. M., A. V. Lizunov, E. I. Goryunov, et al. "Derivatives of (2-carbamoyl ethyl)diphenylphosphine oxides: synthesis and extraction properties with respect to actinides and lanthanides." Журнал неорганической химии 69, no. 1 (2024): 99–109. http://dx.doi.org/10.31857/s0044457x24010124.

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A series of (2–carbamoyl ethyl)diphenylphosphine oxides (KFO) has been synthesized from commercially available reagents — diphenyl chlorophosphine and acrylamides. The influence of the number of ligand fragments of Ph2P(O)(CH2)2C(O), the nature of the oligoyl radical binding these fragments, as well as the presence of additional coordination centers in the KEFO molecule on the extraction properties of KEFO with respect to actinides and lanthanides was investigated. It was found that N,N′-methylene-bis[3-(diphenylphosphoryl) has the greatest efficiency in the extraction of actinidespropionamide
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2

Xie, Long-Yong, Sha Peng, Li-Hua Yang, and Xiao-Wen Liu. "Metal-Free Synthesis of Carbamoylated Chroman-4-Ones via Cascade Radical Annulation of 2-(Allyloxy)arylaldehydes with Oxamic Acids." Molecules 27, no. 20 (2022): 7049. http://dx.doi.org/10.3390/molecules27207049.

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An efficient and straightforward approach for the synthesis of carbamoylated chroman-4-ones has been well-developed. The reaction is triggered through the generation of carbamoyl radicals from oxamic acids under metal-free conditions, which subsequently undergoes decarboxylative radical cascade cyclization on 2-(allyloxy)arylaldehydes to afford various amide-containing chroman-4-one scaffolds with high functional group tolerance and a broad substrate scope.
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3

Koshiishi, Ichiro, Kazunori Tsuchida, Tokuko Takajo, and Makiko Komatsu. "Radical scavenger can scavenge lipid allyl radicals complexed with lipoxygenase at lower oxygen content." Biochemical Journal 395, no. 2 (2006): 303–9. http://dx.doi.org/10.1042/bj20051595.

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Lipoxygenases have been proposed to be a possible factor that is responsible for the pathology of certain diseases, including ischaemic injury. In the peroxidation process of linoleic acid by lipoxygenase, the E,Z-linoleate allyl radical–lipoxygenase complex seems to be generated as an intermediate. In the present study, we evaluated whether E,Z-linoleate allyl radicals on the enzyme are scavenged by radical scavengers. Linoleic acid, the content of which was greater than the dissolved oxygen content, was treated with soya bean lipoxygenase-1 (ferric form) in the presence of radical scavenger,
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4

Tang, Jia-Jun, Meng-Yang Zhao, Ying-Jun Lin, Li-Hua Yang, and Long-Yong Xie. "Persulfate-Promoted Carbamoylation/Cyclization of Alkenes: Synthesis of Amide-Containing Quinazolinones." Molecules 29, no. 5 (2024): 997. http://dx.doi.org/10.3390/molecules29050997.

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The incorporation of amide groups into biologically active molecules has been proven to be an efficient strategy for drug design and discovery. In this study, we present a simple and practical method for the synthesis of amide-containing quinazolin-4(3H)-ones under transition-metal-free conditions. This is achieved through a carbamoyl-radical-triggered cascade cyclization of N3-alkenyl-tethered quinazolinones. Notably, the carbamoyl radical is generated in situ from the oxidative decarboxylative process of oxamic acids in the presence of (NH4)2S2O8.
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5

Raviola, Carlotta, Stefano Protti, Davide Ravelli, and Maurizio Fagnoni. "Photogenerated acyl/alkoxycarbonyl/carbamoyl radicals for sustainable synthesis." Green Chemistry 21, no. 4 (2019): 748–64. http://dx.doi.org/10.1039/c8gc03810d.

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Minisci, Francesco, Fausta Coppa, and Francesca Fontana. "Reactivity of carbamoyl radicals: the first general and convenient free-radical synthesis of isocyanates." Journal of the Chemical Society, Chemical Communications, no. 6 (1994): 679. http://dx.doi.org/10.1039/c39940000679.

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7

Petersen, Wade F., Richard J. K. Taylor, and James R. Donald. "Photoredox-catalyzed procedure for carbamoyl radical generation: 3,4-dihydroquinolin-2-one and quinolin-2-one synthesis." Organic & Biomolecular Chemistry 15, no. 27 (2017): 5831–45. http://dx.doi.org/10.1039/c7ob01274h.

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8

de Pedro Beato, Eduardo, Daniele Mazzarella, Matteo Balletti, and Paolo Melchiorre. "Photochemical generation of acyl and carbamoyl radicals using a nucleophilic organic catalyst: applications and mechanism thereof." Chemical Science 11, no. 24 (2020): 6312–24. http://dx.doi.org/10.1039/d0sc02313b.

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An organic catalyst uses low-energy photons to generate acyl and carbamoyl radicals upon activation of the corresponding chlorides via a nucleophilic acyl substitution path. The synthetic potential and the mechanism of this strategy are discussed.
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9

Osmanoğlua, Şemsettin, Murat Aydın, and M. Halim Başkana. "EPR of Gamma-irradiated L-Glutamine Hydrochloride and N-Carbamoyl-L-glutamic Acid." Zeitschrift für Naturforschung A 60, no. 7 (2005): 549–53. http://dx.doi.org/10.1515/zna-2005-0715.

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The electron paramagnetic resonance spectra of γ -irradiated L-glutamine hydrochloride and N-carbamoyl- L-glutamic acid single crystals have been investigated at room temperature. Radiation damage centres are attributed to ĊH, ṄH2 and CH2Ċ(NH2)COOH radicals.
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10

MINISCI, F., F. COPPA, and F. FONTANA. "ChemInform Abstract: Reactivity of Carbamoyl Radicals: The First General and Convenient Free-Radical Synthesis of Isocyanates." ChemInform 25, no. 31 (2010): no. http://dx.doi.org/10.1002/chin.199431121.

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Tesis sobre el tema "Radicaux carbamoyles"

1

Badufle, Margaux. "Nouvelle méthode pour la synthèse d'acides N-aryloxamiques et applications." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0365.

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Ce manuscrit présente un nouveau procédé de synthèse d’acides oxamiques aromatiques et leur utilisation en tant que précurseurs de radicaux carbamoyles, pour promouvoir une chimie plus verte et plus sûre des isocyanates. La première étape de ce procédé consiste en une réaction de couplage croisé d’Ullmann-Goldberg entre un iodure d’aryle et un oxamate primaire. Son optimisation a mis en évidence l’influence significative du substituant de l’oxamate sur le rendement de la réaction, et différents modes de désactivation du catalyseur. Un grand nombre d’oxamates aromatiques ont ainsi été synthétis
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2

Carrière, Anne. "Cyclisations tandem de radicaux alpha-alcoxycarbonyle, alpha-carbamoyle et alpha-carbonyle : application à la synthèse de composés bicycliques." Aix-Marseille 3, 1994. http://www.theses.fr/1994AIX30084.

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La cyclisation de radicaux alpha-alcoxycarbonyle permet l'obtention de lactones. De meme, la cyclisation de radicaux alpha-carbamoyle et alpha-carbonyle conduit a des lactames et des cycloalcanones. Notre but etait de preparer des composes bicycliques via une cyclisation tandem de ces intermediaires radicalaires. Pour atteindre cet objectif, nous avons utilise diverses methodologies de production de ces radicaux a partir de precurseurs varies. La cyclisation oxydante d'esters allyliques actives ne permet d'obtenir ni des 2-oxo-3-oxa-bicyclo3. 1. 0hexanes ni des 2-oxo-3-oxa-bicyclo3. 3. 0octane
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3

Potin-Gautier, Martine. "Photoamidation d'olefines fluorees, en milieu homogene et en milieux microemulsions non aqueux." Toulouse 3, 1987. http://www.theses.fr/1987TOU30011.

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Les amides perfluores et mixtes (a doubles chaines hydrogenee et perfluoree) sont des precurseurs de tensioactifs susceptibles d'ameliorer les proprietes des mousses extinctrices, par diminution de la tension interfaciale entre l'eau et l'huile par un meilleur etalement de la mousse. Ces amides sont synthetises par photoamidation d'olefines : r::(f)-ch=ch::(2), r::(f)-ch=ch-r::(h), r::(f)-ch::(2)-ch=ch-r::(h) dans le t-butanol et dans des microemulsions de formamide
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4

Chan, Chien-Ching, and 詹前慶. "Substituent and Solvent Effects on Keto-Enol Tautomerism of Acetyl, Carbamoyl Derivatives, and Their Radical Cations." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/41560203078684144988.

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碩士<br>國立清華大學<br>化學系<br>87<br>Abstract The results of DFT study of the substituent effects on molecular structures, relative stabilities, and mechanisms of intramolecular proton transfer in isolated acetyl and carbamoyl drivatives, for both neutral molecules and their radical cations, are reported. The reaction in the presence of one and two water molecules is also investigated. Furthermore, the effect of bulk water is considered for the system with two water molecules using the PCM continuum models. All of geometries of the local minima and transition states were optimized without
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Capítulos de libros sobre el tema "Radicaux carbamoyles"

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"The Chemical Logic for Major Reaction Types." In Natural Product Biosynthesis. The Royal Society of Chemistry, 2022. http://dx.doi.org/10.1039/bk9781839165641-00022.

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This chapter defines a core set of central metabolites that are thermodynamically activated but sufficiently stable kinetically to serve as diffusible molecules that power coupled reaction equilibria to drive biosynthesis in both primary and secondary pathways. Three such molecules are adenosine triphosphate (ATP), acetyl-coenzyme A (CoA), and the reduced nicotinamide coenzymes NADH and NADPH, which serve as cellular currencies for phosphoryl-, acetyl-, and electron transfers, respectively. ATP's thermodynamic activation arises from its kinetically stable side chain phosphoric anhydride linkag
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