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Relevant bibliographies by topics / N-phenyl nitrones

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Academic literature on the topic 'N-phenyl nitrones'

Author: Grafiati

Published: 18 May 2024

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Journal articles on the topic "N-phenyl nitrones"

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Gallis, David E., James A. Warshaw, Bruce J. Acken та DeLanson R. Crist. "Electronic Nature of α-Methoxy, Amino, Cyano, and Mercapto Nitrones". Collection of Czechoslovak Chemical Communications 58, № 1 (1993): 125–41. http://dx.doi.org/10.1135/cccc19930125.

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The electronic nature of various C-substituted nitrones was investigated by IR spectroscopy and 13C NMR as well as MNDO calculations. These include α-methoxy nitrones (imidate N-oxides) RC(OMe)=N(O)t-Bu with R = p-MeOC6H4 (Ia), C6H5 (Ib), p-NO2C6H4 (Ic), and H (Id) and nitrones YCH=N(O)t-Bu with Y = CN (IIIa), n-BuS (IIIb), C6H5CH2NH (IIIc). Upfield 13C shifts of C(α), the iminyl (C=N) carbon, of imidate N-oxides I versus the corresponding imidates are less than the usual upfield shifts of imine N-oxides versus imines, suggesting less buildup of electron density on C(α) in the case of alcoxy n

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Marano, Stefania, Cristina Minnelli, Lorenzo Ripani, et al. "Insights into the Antioxidant Mechanism of Newly Synthesized Benzoxazinic Nitrones: In Vitro and In Silico Studies with DPPH Model Radical." Antioxidants 10, no. 8 (2021): 1224. http://dx.doi.org/10.3390/antiox10081224.

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Synthetic nitrone spin-traps are being explored as therapeutic agents for the treatment of a wide range of oxidative stress-related pathologies, including but not limited to stroke, cancer, cardiovascular, and neurodegenerative diseases. In this context, increasing efforts are currently being made to the design and synthesis of new nitrone-based compounds with enhanced efficacy. The most researched nitrones are surely the ones related to α-phenyl-tert-butylnitrone (PBN) and 5,5-dimethyl-1-pyrroline N-oxide (DMPO) derivatives, which have shown to possess potent biological activity in many exper

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Chamorro, Beatriz, Iwona E. Głowacka, Joanna Gotkowska, et al. "Nucleobase-Derived Nitrones: Synthesis and Antioxidant and Neuroprotective Activities in an In Vitro Model of Ischemia–Reperfusion." International Journal of Molecular Sciences 23, no. 6 (2022): 3411. http://dx.doi.org/10.3390/ijms23063411.

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Herein, we report the synthesis, antioxidant, and neuroprotective properties of some nucleobase-derived nitrones named 9a–i. The neuroprotective properties of nitrones, 9a–i, were measured against an oxygen-glucose-deprivation in vitro ischemia model using human neuroblastoma SH-SY5Y cells. Our results indicate that nitrones, 9a–i, have better neuroprotective and antioxidant properties than α-phenyl-N-tert-butylnitrone (PBN) and are similar to N-acetyl-L-cysteine (NAC), a well-known antioxidant and neuroprotective agent. The nitrones with the highest neuroprotective capacity were those contain

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Nakajima, Akira, Yuto Ueda, Nobuyuki Endoh, Kunihiko Tajima, and Keisuke Makino. "Electron spin resonance analysis of the oxidation reactions of nitrone type spin traps with gold(III) ion." Canadian Journal of Chemistry 83, no. 8 (2005): 1178–84. http://dx.doi.org/10.1139/v05-132.

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When cyclic nitrones, such as 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), 4-phenyl-5,5-dimethyl-1- pyrroline-N-oxide (PDMPO), and 3,3,5,5-tetramethyl-1-pyrroline-N-oxide (M4PO) were mixed with hydrogen tetrachloro aurate(III), DMPOX (5,5-dimethyl-1-pyrrolid-2-one-N-oxyl) type free radicals appeared with the precipitation of Au(0). The reaction did not proceed with noncyclic nitrones, such as N-tert-butyl-α-phenyl-nitrone (PBN) and α-(4-pyridyl-1-oxide)-N-tert-butyl-nitrone (POBN). The order of the HAuCl4 decrease was DMPO > PDMPO > M4PO. The reaction was depressed by the addition of chlorid

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Rosselin, Marie, Fanny Choteau, Kamal Zéamari та ін. "Reactivities of Substituted α-Phenyl-N-tert-butyl Nitrones". Journal of Organic Chemistry 79, № 14 (2014): 6615–26. http://dx.doi.org/10.1021/jo501121g.

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Kliegel, W., L. Preu, Steven J. Rettig, and James Trotter. "Structural studies of organoboron compounds. XXI. Crystal and molecular structures of 3-(phenylmethylidene)-4-methyl-1-phenyl-2,6,7-trioxa-3-azonia-1-boratabicyclo-[2.2.2]octane and N-(4-nitrophenylmethylidene)-5-methyl-2-phenyl-1,3-dioxa-2-bora-5-cyclohexaneamine N-oxide." Canadian Journal of Chemistry 63, no. 2 (1985): 509–15. http://dx.doi.org/10.1139/v85-083.

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Crystals of 3-(phenylmethylidene)-4-methyl-1-phenyl-2,6,7-trioxa-3-azonia-1-boratabicyclo[2.2.2]octane are orthorhombic, a = 8.0732(7), b = 11.8499(10), c = 31.679(2) Å, Z = 8, space group Pbca, and those of N-(4-nitrophenylmethylidene)-5-methyl-2-phenyl-1,3-dioxa-2-bora-5-cyclohexaneamine N-oxide are monoclinic, a = 6.1873(6), b = 23.206(2), c = 11.3081(11) Å, β = 92.326(5)°, Z = 4, space group P21/n. Both structures were solved by direct methods and were refined by full-matrix least-squares procedures to final R values of 0.041 and 0.036 for 943 and 1679 reflections with I ≥ 3σ(I), respectiv

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Mekheimer, Ramadan A., Khadijah Al-Zaydi, Mahmoud A. A. Ibrahim, Asma Al-Shamary, and Kamal Sadek. "Regio- and stereoselective 1,3-dipolar cycloaddition reactions of C-aryl (or hetaryl)-N-phenylnitrones to monosubstituted ylidene malononitriles and 4-benzylidene-2-phenyloxazol-5(4H)-one." Zeitschrift für Naturforschung B 72, no. 5 (2017): 317–26. http://dx.doi.org/10.1515/znb-2016-0263.

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AbstractThe first example of 1,3-dipolar cycloaddition reactions of C-aryl (or hetaryl)-N-phenylnitrones to monosubstituted ylidene malononitriles and 4-benzylidene-2-phenyl-oxazol-5(4H)-one is described. The reaction of C-(4-(dimethylamino)phenyl)-N-phenyl-nitrone (1a) with 2-(4-substituted-benzylidene)malononitriles 2a, b in dry toluene, in the absence of catalyst, at reflux temperature furnished the novel cycloadducts 2-(3-aryl-2-phenyl-2,3-dihydro-1,2,4-oxadiazol-5-yl)-3-(4-methoxyphenyl)acrylonitriles 3a, b. Refluxing C-aryl (or hetaryl)-N-phenylnitrones 1b–i with 2-(4-methoxy-benzylidene

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Kliegel, Wolfgang, Jörg Metge, Steven J. Rettig, and James Trotter. "Aromatic aldonitrones of 2-(hydroxyamino)benzyl alcohol and their cyclic isomers. Crystal and molecular structures of a 1-hydroxy-1,2-dihydro-4H-3,1-benzoxazine, a boron chelate, and its parent nitrone ligand." Canadian Journal of Chemistry 76, no. 4 (1998): 389–99. http://dx.doi.org/10.1139/v98-023.

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The synthesis of a series of C-aryl-N-[2-(hydroxymethyl)phenyl]nitrones, 5 (that can also exist under certain conditions as isomeric 1-hydroxy-2-aryl-1,2-dihydro-4H-3,1-benzoxazines, 8), via 2-(hydroxyamino)benzyl alcohol, 4, and their subsequent reactions with oxybis(diphenylborane), (Ph2B)2O, leading to the 5-(arylmethylene)-7,7-diphenyl-6,8-dioxa- 5-azonia-7-borata-5H-6,7,8,9-tetrahydrobenzocyclo- heptenes 6 are described. Crystals of 1-hydroxy-2- (4-methoxyphenyl)- 1,2-dihydro-4H-3,1-benzoxazine, 8b, are monoclinic, a = 9.379(2), b = 10.699(2), c = 12.9392(7) Å, β = 99.916(2)°, Z = 4 (two

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Suda, Kohji, Toshio Tsujimoto та Masashige Yamauchi. "13C and1H NMR of Arylnitrones. Substituent Effects of α-Phenyl-N-(p-substituted phenyl)nitrones". Bulletin of the Chemical Society of Japan 60, № 10 (1987): 3607–11. http://dx.doi.org/10.1246/bcsj.60.3607.

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Chamorro, Beatriz, David García-Vieira, Daniel Diez-Iriepa та ін. "Synthesis, Neuroprotection, and Antioxidant Activity of 1,1′-Biphenylnitrones as α-Phenyl-N-tert-butylnitrone Analogues in In Vitro Ischemia Models". Molecules 26, № 4 (2021): 1127. http://dx.doi.org/10.3390/molecules26041127.

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Herein, we report the neuroprotective and antioxidant activity of 1,1′-biphenyl nitrones (BPNs) 1–5 as α-phenyl-N-tert-butylnitrone analogues prepared from commercially available [1,1′-biphenyl]-4-carbaldehyde and [1,1′-biphenyl]-4,4′-dicarbaldehyde. The neuroprotection of BPNs1-5 has been measured against oligomycin A/rotenone and in an oxygen–glucose deprivation in vitro ischemia model in human neuroblastoma SH-SY5Y cells. Our results indicate that BPNs 1–5 have better neuroprotective and antioxidant properties than α-phenyl-N-tert-butylnitrone (PBN), and they are quite similar to N-acetyl-L

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Dissertations / Theses on the topic "N-phenyl nitrones"

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Chhetri, Manjit Singh. "N-cyclohenyl, N-phenyl nitrones and their potentiality in isoxazolidine and isoxazoline syntheses." Thesis, University of North Bengal, 2010. http://hdl.handle.net/123456789/1364.

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Sharma, Prawin Kumar. "Greener approach to the synthesis of some novel class of isoxazolidine and isoxazoline derivatives using N-methyl and N-phenyl-a-chloro nitrones." Thesis, University of North Bengal, 2016. http://ir.nbu.ac.in/handle/123456789/1884.

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Kafley, Saurav. "Synthesis and 1, 3 -dipolar cycloaddition reaction of N-phenyl £ chlora nitrone." Thesis, University of North Bengal, 2010. http://hdl.handle.net/123456789/1419.

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Trudeau-Lame, Mary E. "Pharmacokinetics and metabolism of the reactive oxygen scavenger, [alpha]-phenyl-N-tert-butyl nitrone (PBN) and the effects of 3-nitropropionic acid in the Sprague-Dawley rat /." 2002. http://www.consuls.org/record=b2585514.

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Thesis (M.S.)--Central Connecticut State University, 2002.<br>Thesis advisor: Michael A. La Fontaine. " ... in partial fulfillment of the requirements for the degree of Master in Natural Science-Chemistry." Includes bibliographical references (leaves 61-66). Also available via the World Wide Web.

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Book chapters on the topic "N-phenyl nitrones"

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Kishida, H., D. Nakae, O. Kusuoka, et al. "Inhibition of the Development of Hepatocellular Carcinoma by Phenyl N-Tert-Butyl Nitrone in Rats Fed a Choline-Deficient, L-Amino-Acid-Defined Diet." In Oxidative Stress and Digestive Diseases. KARGER, 2001. http://dx.doi.org/10.1159/000062721.

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2

I. Al-Sulami, Ahlam, and Tesfay G. Ashebr. "Novel Synthesis of N–N Azo and Hydrazine Phenyl Ligand Derivatives for Copper(II) Complex Bio-Active Application." In Various Uses of Copper Material [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1004323.

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Copper(II) complexes possess relatively a broad spectrum of medicinal importance with less toxicity. It is important to note that, in this chapter, copper(II) is selected as chelating central metal atom considering its current reputation to design such bio-active compounds due to its; (i) permits in realizing stable coordination compound, (ii) diverse coordinating capability with oxygen (O), nitrogen (N), sulfur (S) and phosphorus (P) donor ligands, and (iii) exhibits potentially better biological activity. Therefore, the presented chapter offers the up-to-date advancement and future perspective of bio-active copper(II) complexes derived from Schiff base of azo- and phenyl hydrazine-based ligands and their derivatives. To showcase the existing trend of these classes of bio-active compounds, due to the wide depth of the literature, selected seminal compounds exhibiting outstanding biological activity are discussed in detail. Recent studies establish that azo- and phenyl hydrazine-based bio-active copper(II) complexes are among the promising candidates that are expected to replace the conventional antibiotics which are suffering from side effects as well as microbial resistance. However, the collaborative efforts of chemists and biotechnologists are still needed to realize their real world application.

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Rajan, Guru Sankar. "Poly(p–benzamide)." In Polymer Data Handbook. Oxford University PressNew York, NY, 2009. http://dx.doi.org/10.1093/oso/9780195181012.003.0060.

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Abstract General Information PBA is the first nonpeptide, synthetic condensation polymer reported to form liquid–crystalline solution. There are several routes to obtain PBA. PBA forms liquid–crystalline solutions because of an inherently extended rigid chain structure produced by a combination of the carbon–nitrogen bond in predominantly trans amide linkages. The molecular conformation is TCTC(T = trans,C = cis), where the internal rotation angles about the N C bond of the amide group and about the virtual bond of N phenyl C are T and C conformations, respectively. The chain of all amide groups is in the head-to-tail order for PBA. Major Applications The dopes of PBA can be utilized for the preparation of films, filaments, fibrids, and coatings. Wet extruded, tough, clear, flexible films can be applied to substrates like glass, ceramics, metals, concrete, and polymeric materials. The high temperature resistance of the polyaramids makes them suitable for asbestos replacement in heat-resistant work wear. PBA has been superseded by poly(p–phenylene terephthalamide).

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Conference papers on the topic "N-phenyl nitrones"

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Yanagisawa, M., M. Kunimoto, and T. Homma. "Chemical Analysis of Ultra-Thin DLC Films and Lubricant/DLC Interface Using Plasmonic Sensors." In ASME 2014 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/isps2014-6908.

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The technical potential of a new plasmonic sensor, which can acquire surface-enhanced Raman spectra with high sensitivity by controlling surface plasmons is demonstrated for the chemical analysis of diamond-like carbon (DLC) films, lubricant films, and the DLC/lubricant interface on magnetic disks of sub-nanometer scale. The Raman spectra of thin DLC films and lubricated DLC carbon can be acquired with a high S/N ratio. Raman spectra of lubricated DLC carbon can also be acquired with the high S/N ratio. The wavenumber shift and intensity change of the Raman peaks of the phenyl and hydroxyl gro

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M. AHMED, Riyadh, Sarah S. ABDUL RAHMAN, Dhefaf H. BADRI, Khawla M. SULTAN, Ismaeel Y. MAJEED, and Ghada M. KAMIL. "SYNTHESIS AND CHARACTERISATION OF NEW Co(II), Zn(II) AND Cd(II) COMPLEXES DERIVED FROM OXADIAZOLE LIGAND AND 1,10-PHENANTHROLINE AS Co-LIGAND." In V. International Scientific Congress of Pure, Applied and Technological Sciences. Rimar Academy, 2022. http://dx.doi.org/10.47832/minarcongress5-5.

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In this work, prepared new ligand namely 5-(2,4—dichloro-phenyl)-1,3,4- oxadiazole-2-(3H)-thion, which was obtained from the 2,4-dichlorobenzoyl chloride with hydrazine, after that reaction with CS2/KOH in methanol. This ligand was reaction with (Co, Zn and Cd) and 1,10-phenanthroline as co-ligand. The ligand and complexes were characterised by IR, UV-Vis, C-H-N, magnetic moment, A.A, Cl content, and m.p.. The data that collected indicate the octahedral geometry around metal ions in all complexes. In IR spectra of complexes, the small shift in ν(C=S), indicating the exocyclic sulfur is not bon

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Khosravi, Zohreh, Alena Hinze, and Claus-Peter Klages. "In-situ FTIR-ATR spectroscopic investigations of atmospheric-pressure plasma modification of polyolefin thin films." In 13th International Conference on Plasma Surface Engineering September 10 - 14, 2012, in Garmisch-Partenkirchen, Germany. Linköping University Electronic Press, 2013. http://dx.doi.org/10.3384/wcc2.239-242.

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Surface treatment of polyolefines by atmospheric-pressure dielectric barrier discharges (DBDs) in virtually oxygen-free nitrogen-containing gases was studied in situ byFourier transform infrared spectroscopy in the attenuated total reflection mode (FTIR-ATR)in order to follow the plasma-chemical generation of chemical functional groups and their further temporal development in the presence of inert or reactive atmospheres.Polyolefin thin films of thicknesses between 50 and 200 nm were prepared directly on ZnS ATR crystals by spin-coating from hot solutions of linear low-density polyethylene (L

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