Relevant bibliographies by topics / Keto-enolic

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Academic literature on the topic 'Keto-enolic'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Keto-enolic"

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Lamartine, Roger. "Solid State Keto-Enolic Tautomerization." Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 211, no. 1 (1992): 423–30. http://dx.doi.org/10.1080/10587259208025843.

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Costantini, Roberto, Luciano Colazzo, Laura Batini, et al. "Keto–enol tautomerization drives the self-assembly of leucoquinizarin on Au(111)." Chemical Communications 56, no. 19 (2020): 2833–36. http://dx.doi.org/10.1039/c9cc09915h.

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Arkhipov, Sergey G., Peter S. Sherin, Alexey S. Kiryutin, Vladimir A. Lazarenko, and Christian Tantardini. "The role of S-bond in tenoxicam keto–enolic tautomerization." CrystEngComm 21, no. 36 (2019): 5392–401. http://dx.doi.org/10.1039/c9ce00874h.

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A non-covalent interaction between the sulphur atom of thiophenyl moiety and oxygen of the carbonyl group (S-bond) plays a crucial role in keto–enol tautomerization of tenoxicam leading to the crystallization of latter only in zwitterionic (ZWC) and not in β-keto–enolic (BKE) form.
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Rawat, M. S. M., Sudagar Mal, and Pramod Singh. "Photochromism in Anils - A Review." Open Chemistry Journal 2, no. 1 (2015): 7–19. http://dx.doi.org/10.2174/1874842201502010007.

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This review describes in brief the historical perspective of photochromism and photochromic behaviour of ‘Anils’. This phenomenon among ‘Anils’ is exhibited due to the tautomerism between enol and keto form via six membered hydrogen transfer between the phenolic hydrogen and imine nitrogen and show the phenomenon of solid-state photochromism and thermochromism and photochromism in rigid glassy solutions as well. Photochromic property in ‘Anils’ is a characteristic of the molecule, but their chromo behaviour is not only influenced by the crystal structure of anils but also by the substituents i
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Collins, David J., and Ian T. Crosby. "Enolic Ortho Esters. VIII Synthesis of (2S,3S)-2,3-Bis(methoxymethyl)-1,4,6-trioxaspiro[4.5]dec-7-ene." Australian Journal of Chemistry 51, no. 11 (1998): 1025. http://dx.doi.org/10.1071/c98085.

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Enolic ortho ester (2S,3S)-2,3-bis(methoxymethyl)-1,4,6-trioxaspiro[4.5]dec-7-ene (10b) was synthesized in 65% yield by cycloadditon of acrolein with the ketene acetal (4S,5S)-4,5-bis(methoxymethyl)-2-methylidene-1,3-dioxolan (7), derived by potassium t-butoxide treatment of (4S,5S)-4,5-bis(methoxy- methyl)-1,3-dioxolan (4). Lewis acid catalysed reaction (TiCl4, CH2Cl2, –78°) of the enolic ortho ester (10b) with the ketene silyl acetal 3-phenylmethyl-2-trimethylsilyloxy-4,5-dihydrofuran (15) afforded the formyl keto ester 3-[4′,5′-bis(methoxymethyl)-2′-(4′′-oxobutyl)-1′,3′-dioxolan-2′-yl]-3-ph
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Collins, DJ, LM Downes, and M. Kyriakou. "Enolic Ortho Esters. III. Preparation of a Keto Acetal by Hydride Reduction of an Enolic Ortho Ester." Australian Journal of Chemistry 42, no. 9 (1989): 1617. http://dx.doi.org/10.1071/ch9891617.

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Lithium aluminium hydride reduction of the enolic ortho ester 4′,4′-dimethyl-3,4,5,8-tetra-hydrospiro [2H-l-benzopyran-2,21-[1,3]dioxolan] (8) in the absence of solvent gave 6-[21-(4″,4″- dimethyl-1″,3″-dioxolan-2″-yl)ethyl]cyclohex-3-en-1-one (11) which was isomerized to the α'β-unsaturated keto acetal (10). Similarly, hydride reduction of the phenolic ortho ester 4′-methyl-3,4-dihydrospiro[2H-1-benzopyran-2,2′-[1,3]dioxolan] (12a) and the 4′,4′-dimethyl analogue (12b), afforded the corresponding phenolic acetals (14a) and (14b) respectively, in high yields.′
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Taguchi, Hiroyasu, Daijiro Yanagisawa, Shigehiro Morikawa, Koichi Hirao, Nobuaki Shirai, and Ikuo Tooyama. "Synthesis and Tautomerism of Curcumin Derivatives and Related Compounds." Australian Journal of Chemistry 68, no. 2 (2015): 224. http://dx.doi.org/10.1071/ch14464.

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1,7-Bis(4′-hydroxy-3′-trifluoromethoxyphenyl)-1,6-heptadiene-3,5-dione (2a), related to curcumin, and thirteen 4-substituted derivatives were prepared and their keto/enol ratio in DMSO[D6] was determined by 19F NMR because the enolic form of these related curcumins had been shown to bind to amyloid plaques in the Alzheimer brain. The parent compound and the 4-ethoxycarbonyl derivative were almost 100 % in the enolic form that contains a conjugated hepta-1,4,6-trien-3-on-5-ol backbone. Enolisation decreased to varying amounts in the derivatives that had 4-substituted alkyl groups. Attempts to p
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Arkhipov, Sergey G., Peter S. Sherin, Alexey S. Kiryutin, Vladimir A. Lazarenko, and Christian Tantardini. "The role of S-bond in tenoxicam keto–enolic tautomerization." Acta Crystallographica Section A Foundations and Advances 77, a2 (2021): C623—C624. http://dx.doi.org/10.1107/s0108767321090711.

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9

G., S. Sanyal, K. Nath P., and Ganguly R. "Studies on oxovanadium(IV) and dioxouranium(VI) complexes of Schiff bases derived from pyrazine-2-carboxylic acid hydrazine and pyrazine-2,3-dicarboxylic acid dihydrazide with salicylaldehyde." Journal of Indian Chemical Society Vol. 79, Jan 2002 (2002): 54–57. https://doi.org/10.5281/zenodo.5840234.

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Department of Chemistry, University of Kalyani, Kalyani-741 235, India <em>E-mail : </em>rakesh_ganguly@yahoo.com&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <em>Fax : </em>91-33-5828282 <em>Manuscript received 6 September 2000, revised 16 March 2001, accepted 12 May 2001</em> Oxovanadium(IV) and dioxouranium(VI) complexes of Schiff bases (L and L&#39;) derived respectively from pyrazine-2-carboxylic acid hydrazide and pyrazine-2,3-dicarboxylic acid dihydrazide with salicylaldehyde h
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Giacopello, Sergio, Mónica E. Deluca, and Alicia M. Seldes. "Synthesis and NMR Studies of Some Steroidal Isoxazoles." Zeitschrift für Naturforschung B 47, no. 6 (1992): 891–97. http://dx.doi.org/10.1515/znb-1992-0620.

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A short synthesis of 17α-pregna-2,4-dien-[2,3-d]isoxazol-17β-ol (1) is described using mild reaction conditions and with a high overall yield. The equilibrium between keto-enolic forms has been studied by 1H NMR methods. Complete assignments of all the resonances in the 1H and 13C NMR spectra of Danazol have been made using a variety of one and two-dimensional correlation methods. 13C NMR spectra of all the intermediate and related model compounds were also assigned.
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Book chapters on the topic "Keto-enolic"

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G. Denis, Meakins. "Aldehydes and ketones." In Functional Groups. Oxford University Press, 1996. http://dx.doi.org/10.1093/hesc/9780198558675.003.0007.

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This chapter talks about the carbon-oxygen double bond or carbonyl group, which is the most common group in organic chemistry. It examines keto and enol forms from the carbonyl group, the oxidation and reduction of carbonyl compounds, reactions of keto and enol forms and enolate anions, and aldol and related condensations. It also describes a polarization that can be expressed in terms of electronic effects or of resonance in which the outcome is the same. The chapter refers to carbonyl compounds that exhibit tautomerism, which is a tautomeric compound that consists of an equilibrium mixture o
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Conference papers on the topic "Keto-enolic"

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Cvijetić, Ilija, Miljan Bigović, Petar Ristivojević, Maja Vitorović-Todorović, Mire Zloh, and Dušanka Milojković-Opsenica. "THERMODYNAMICS OF THE ANTIOXIDANT ACTIVITY OF HUMULONES AND OTHER ANTIOXIDANTS FROM BEER – A MOLECULAR MODELING APPROACH." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.408c.

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Recent experimental study identified eight potent antioxidants in German beers, including isoxanthohumol, (R)- and (S)-adhumulone, cis– and trans-iso-adhumulone, cis– and trans-iso- n-humulone, and desdimetyhyl-octahydro-iso-cohumulone. To provide insights into the structural basis of their radical scavenging activity, we calculated the thermodynamic feasibility of two common antioxidant mechanisms, hydrogen atom transfer (HAT) and single electron transfer followed by proton transfer (SET-PT), using the density functional theory (DFT) with B3LYP/6-311g++(2d,2p) method in the gas phase and impl
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