Gotowe bibliografie tematyczne / Tandem photochemical reaction

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Gotowa bibliografia na temat „Tandem photochemical reaction”

Autor: Grafiati

Data publikacji: 2 listopada 2024

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Tandem photochemical reaction"

Saunthwal, Rakesh K., James Mortimer, Andrew J. Orr-Ewing, and Jonathan Clayden. "Enantioselective one-carbon expansion of aromatic rings by simultaneous formation and chromoselective irradiation of a transient coloured enolate." Chemical Science 13, no. 7 (2022): 2079–85. http://dx.doi.org/10.1039/d1sc06684f.

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Irradiation of a mixture of aromatic amide and chiral base leads to a tandem reaction sequence in which dearomatization forms a chromophore capable of photochemical rearrangement leading to overall asymmetric expansion of the aromatic ring.

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Hoffmann, Norbert, Samuel Bertrand, Siniša Marinković, and Jens Pesch. "Efficient radical addition of tertiary amines to alkenes using photochemical electron transfer." Pure and Applied Chemistry 78, no. 12 (2006): 2227–46. http://dx.doi.org/10.1351/pac200678122227.

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An efficient photoinduced radical addition of tertiary amine, mainly cyclic derivatives, to electron-deficient alkenes was developed. The reaction was applied to the asymmetric synthesis of the pyrrolizidine alkaloids laburnine and isoretronecanol. The method was then optimized for the addition of a larger variety of tertiary amines, in particular acyclic ones. Radical tandem addition cyclization reactions with unsaturated tertiary amines have also been investigated. A detailed mechanistic study using isotopic labeling enabled the optimization of a corresponding reaction with N,N-dialkylanilin

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Chiminelli, Maurizio, Gabriele Scarica, Andrea Serafino, Luciano Marchiò, Rosanna Viscardi, and Giovanni Maestri. "Visible-Light-Promoted Tandem Skeletal Rearrangement/Dearomatization of Heteroaryl Enallenes." Molecules 29, no. 3 (2024): 595. http://dx.doi.org/10.3390/molecules29030595.

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Access to complex three-dimensional molecular architectures via dearomatization of ubiquitous aryl rings is a powerful synthetic tool, which faces, however, an inherent challenge to overcome energetic costs due to the loss of aromatic stabilization energy. Photochemical methods that allow one to populate high-energy states can thus be an ideal strategy to accomplish otherwise prohibitive reaction pathways. We present an original dearomative rearrangement of heteroaryl acryloylallenamides that leads to complex fused tricycles. The visible-light-promoted method occurs under mild conditions and t

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Hou, Yunyan, and Peter Wan. "A pentacene intermediate via formal intramolecular photoredox of a 6,13-pentacenequinone in aqueous solution." Canadian Journal of Chemistry 85, no. 12 (2007): 1023–32. http://dx.doi.org/10.1139/v07-117.

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The formal intramolecular photoredox reaction (or tandem phototautomerizations) of aromatic ketones in aqueous solution discovered in our laboratory has been extended to a number of acenequinones. In particular, we were interested in whether the photoredox reaction could be applied to 2-(hydroxymethyl)-6,13-pentacenequinone (4), which would result in 2-formyl-6,13-dihydroxypentacene (10) and hence offer a photochemical method for synthesizing a pentacene derivative. Whereas a number of acenequinones displayed a range of photoredox reactivity, photolysis of 4 in acidic aqueous solution (pH <

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Samiran, Kar, and Lahiri Saswati. "Photochemical intramolecular cyclization routes to heterocycles." Journal of Indian Chemical Society Vol. 76, Nov-Dec 1999 (1999): 607–10. https://doi.org/10.5281/zenodo.5862417.

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Department of Organic Chemistry, Indian Association for the Cultivation of Science, Calcutta-700 032, India Manuscript received 27 August 1999 1-Aryl-3-(2-azidoaryl)prop-2-en-1-ones have been prepared from o-nitro aromatic aldehydes. The 2-aroylindole derivatives are easily prepared from these derivatives in a tandem reaction sequence in moderate yields. Photolytic process is found to be much more facile than the thermal process in this transformation. Naphthofuran derivatives have been prepared by metalcatalyzed intramolecular photocyclizations of 1-aryl-3-(2-methoxy-1-napht

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Liang, Yan Ru, Yu Yun Wen, Xiao Yan Hong, Zhen Bin Gong, and Wen Quan Li. "Laboratory Simulation Study of Photo-Degradation Process of Fenvalerate in Aqueous Solution." Applied Mechanics and Materials 312 (February 2013): 886–92. http://dx.doi.org/10.4028/www.scientific.net/amm.312.886.

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A laboratory-made the efficient photochemical degradation experimental device, combined with high performance liquid chromatography-tandem diode array detector device (DAD), fluorescence detector (FLD), mass spectrometer detector (MS), research fenvalerate its photo degradation. The structure of the spectral characteristics is the product, photo degradation reaction kinetics of degradation products, suggesting fenvalerate light chemical degradation process in an aqueous solution. The spectral characteristics of fenvalerate under ultraviolet light can be degraded into smaller organic molecules;

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Ren, Jia, Elissia T. Franklin, and Yu Xia. "Uncovering Structural Diversity of Unsaturated Fatty Acyls in Cholesteryl Esters via Photochemical Reaction and Tandem Mass Spectrometry." Journal of The American Society for Mass Spectrometry 28, no. 7 (2017): 1432–41. http://dx.doi.org/10.1007/s13361-017-1639-6.

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Li, Hai-Fang, Jing Zhao, Wenbo Cao, Wenpeng Zhang, Yu Xia, and Zheng Ouyang. "Site-Specific Photochemical Reaction for Improved C=C Location Analysis of Unsaturated Lipids by Ultraviolet Photodissociation." Research 2022 (February 12, 2022): 1–12. http://dx.doi.org/10.34133/2022/9783602.

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Unraveling the complexity of the lipidome requires the development of novel approaches to facilitate structural identification and characterization of lipid species with isomer-level discrimination. Ultraviolet photodissociation tandem mass spectrometry (UVPD MS/MS) is a promising tool for structure determination of lipids. The sensitivity of UVPD for lipid analysis however is limited mainly due to weak absorption of UV photons by a C=C. Herein, a C=C site-specific derivatization, the Paternò-Büchi (PB) reaction, was used to incorporate a chromophore to the C=C moiety in fatty acyls, leading t

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Ma, Xiaoxiao, Leelyn Chong, Ran Tian, et al. "Identification and quantitation of lipid C=C location isomers: A shotgun lipidomics approach enabled by photochemical reaction." Proceedings of the National Academy of Sciences 113, no. 10 (2016): 2573–78. http://dx.doi.org/10.1073/pnas.1523356113.

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The field of lipidomics has been significantly advanced by mass spectrometric analysis. The distinction and quantitation of the unsaturated lipid isomers, however, remain a long-standing challenge. In this study, we have developed an analytical tool for both identification and quantitation of lipid C=C location isomers from complex mixtures using online Paternò–Büchi reaction coupled with tandem mass spectrometry (MS/MS). The potential of this method has been demonstrated with an implementation into shotgun lipid analysis of animal tissues. Among 96 of the unsaturated fatty acids and glyceroph

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Javier, Corpas, Gomez-Mendoza Miguel, Ramírez-Cárdenas Jonathan, et al. "One-Metal/Two-Ligand for Dual Activation Tandem Catalysis: Photoinduced Cu-Catalyzed Anti-hydroboration of Alkynes." J. Am. Chem. Soc. 144, no. 2022 (2022): 13006−13017. https://doi.org/10.5281/zenodo.7684895.

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A dual catalyst system based on ligand exchange of two diphosphine ligands possessing different properties in a copper complex has been devised to merge metal- and photocatalytic activation modes. This strategy has been applied to the formal anti-hydroboration of activated internal alkynes via a tandem sequence in which Cu/Xantphos catalyzes the B2pin2-syn-hydroboration of the alkyne whereas Cu/BINAP serves as a photocatalyst for visible light-mediated isomerization of the resulting alkenyl boronic ester. Photochemical studies by means of UV–vis absorption,

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Rozprawy doktorskie na temat "Tandem photochemical reaction"

Yu, Xiaodan. "New functionalized alkylidenecyclobutanes : multicomponent synthesis and applications." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASF034.

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Les dérivés du cyclobutane sont devenus de plus en plus importants en tant que blocs de construction moléculaires en raison de leur contrainte cyclique inhérente et de la modification sélective de leurs structures qui peuvent être utilisées de manière stratégique dans la synthèse organique. Les cycles cyclobutane apparaissent également dans les structures moléculaires d'un large panel de molécules naturelles et synthétiques qui présentent des activités biologiques intéressantes. Au sein de cette grande famille, les sous-unités alkylidènecyclobutane sont rencontrées dans des produits naturels,

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(5929454), Sarju Adhikari. "RADICAL CHEMISTRY AND MASS SPECTROMETRY FOR ENHANCED BIOMOLECULE ANALYSIS." Thesis, 2019.

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Electrospray ionization-tandem mass spectrometry (ESI-MS/MS) has been established as a powerful tool for qualitative and quantitative analysis of biomolecules. However, mass spectrometric analysis of biomolecules is often limited by poor ionization efficiency of analyte for sensitive detection and limited fragmentation for structural characterization. Over the years, various solution phase as well as gas-phase derivatization techniques, have been coupled with MS to increase the ionization efficiency and facilitate the formation of structural informative fragment ions. The research presented

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Części książek na temat "Tandem photochemical reaction"

Winkler, J. D., R. D. Scott, and P. G. Williard,. "Synthesis of a Vindorosine Precursor." In Exercises in Synthetic Organic Chemistry. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780198559443.003.0067.

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Abstract Discussion Points What is the mechanism of the protection sequence a, b? Explain the steroselectivities observed in the photochemical reaction of step f and in the Mannich reaction step g. What is the purpose of tetrabutylammonium fluoride in step h? What is the byproduct of step k? Further Reading For reviews on tandem reaction in the synthesis of natural products, see P. J. Parsons, C. S. Penkett and A. J. Shell, Chem. Rev.,1996, 96,195; J. D. Winkler, C. M. Bowen and F. Liotta, Chem. Rev.,1995, 95,2003.

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Lambert, Tristan H. "Flow Chemistry." In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0017.

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Timothy F. Jamison at MIT developed (Org. Lett. 2013, 15, 710) a metal-free continuous-flow hydrogenation of alkene 1 using the protected hydroxylamine reagent 2 in the presence of free hydroxylamine. The reduction of nitroindole 4 to the corresponding aniline 5 using in situ-generated iron oxide nanocrystals in continuous flow was reported (Angew. Chem. Int. Ed. 2012, 51, 10190) by C. Oliver Kappe at the University of Graz. A flow method for the MPV reduction of ketone 6 to alcohol 7 was disclosed (Org. Lett. 2013, 15, 2278) by Steven V. Ley at the University of Cambridge. Corey R.J. Stephens

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Taber, Douglass F. "Reactions of Alkenes." In Organic Synthesis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199965724.003.0028.

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Ana C. Fernandes of the Instituto Superior Técnico, Lisboa, devised (Tetrahedron Lett. 2010, 51, 1048) an effective Re catalyst for the solvent-free hydrogenation of an alkene 1. Yasushi Imada and Takeshi Naota of Osaka University showed (Organic Lett. 2010, 12, 32) that a flavin could catalyze the hydrogenation of an alkene 3. Note that the thioether was stable under these conditions. Huanfeng Jian of the South China University of Technology developed (J. Org. Chem. 2010, 75, 2321) a Pd-based protocol for the oxidative cleavage of an alkene 5. The cleavage could be halted at the cis diol. K.

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