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Relevant bibliographies by topics / Dimedone 1

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Academic literature on the topic 'Dimedone 1'

Author: Grafiati

Published: 4 June 2025

Last updated: 23 June 2025

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Journal articles on the topic "Dimedone 1"

1

Dietz, Wibke, Yvonne Schwerdtfeger, Uwe Klingebiel та Mathias Noltemeyer. "Bis(1-cyclohexen-3-on-1-oxy)silane, Silyl-enole von β-Ketonen/ Bis (1-cyclohexene-3-on-1-oxy)silanes, Silyl-enoles of β -Ketones". Zeitschrift für Naturforschung B 62, № 11 (2007): 1371–76. http://dx.doi.org/10.1515/znb-2007-1104.

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5,5-Dimethylcyclohexane-1,3-dione (dimedone) and cyclohexane-1,3-dione react with Cl2Si(CMe3)2 in the presence of triethylamine to give the bis(1-cyclohexene-3-on-1-oxy)dit butylsilanes 2 and 3. Using dimedone and Cl2SiMe2, the analogous dimethylsilane 1 is obtained. A 1,4-Michael-Addition occurs using cyclohexane-1,3-dione in the reaction with Cl2SiMe2 to give a spirocyclic diketone (4). The reaction of cyclohexane-1,3-dione with lithium-diisopropylamide and F3SiCMe3 leads to the formation of a salt [iPr2NH2]2HF[C6H7O2]2, 5. The crystal structures of 2 - 5 were determined.

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2

Best, WM, RFC Brown, PD Tiso, and KG Watson. "The Synthesis of Cyclohexane-1,3-diones Bearing an Isoxazoline or a Dihydro-1,2-oxazine Ring at C2." Australian Journal of Chemistry 43, no. 2 (1990): 427. http://dx.doi.org/10.1071/ch9900427.

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Dimedone (6) was C-acylated with 4-(1′-methylethylideneaminooxy) butanoic acid (7), and the product (8) was hydrolysed to give 2-(5′,6′-dihydro-4′H-1′,2′-oxazin-3′-yl)- 5,5-dimethylcyclohexane-1,3-dione (3). The 2-(4′,5′-dihydroisoxazol-3′-yl) 1,3-dione (4) was obtained in <2% yield from dimedone anion and 3-nitro-2-isoxazoline (11).

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3

Martínez-Richa, Antonio, Guillermo Mendoza-Díaz, and Pedro Joseph-Nathan. "Keto-Enol Tautomerism of Dimedone Studied by Dynamic NMR." Applied Spectroscopy 50, no. 11 (1996): 1408–12. http://dx.doi.org/10.1366/0003702963904665.

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The keto-enol tautomeric equilibrium of dimedone has been investigated by high-resolution 13C NMR spectroscopy. Kinetic information of the solution keto-enol tautomerism for dimedone in DMSO, in the temperature range of 25–85 °C, was derived from line shape measurements in a 75-MHz spectrometer. A value of 3.43 Kcal/mol was found for the Arrhenius activation energy Ea and of 1.07 × 106 s−1 for the pre-exponential factor A. With the use of the observed chemical shifts in the high-resolution 13C-NMR spectra of dimedone in the solid state, an estimate coalescence temperature of 240 K for dimedone in DMSO was obtained by extrapolation of the experimental curve. The estimated free energy of activation at the coalescence temperature, Δ Gc≠, is 10.8 Kcal/mol. Finally, the 13C spin-lattice relaxation times, T1(13C), in solid dimedone were measured as a function of temperature in the range of 25 to 90 °C. The data are discussed in terms of the different motional environments that result from the geometric restrictions imposed by hydrogen bonding in the crystal structure.

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4

Cremlyn, Richard J., Alan G. Osborne, and Joanne F. Warmsley. "NMR spectral studies of dimedone-aldehyde adducts Part 1. 1H and 13C NMR spectral studies of dimedone." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 52, no. 11 (1996): 1423–32. http://dx.doi.org/10.1016/0584-8539(96)01695-9.

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5

Oskooie, Hossein A., Leili Tahershamsi, Majid M. Heravi, and Bita Baghernejad. "Cellulose Sulfonic Acid: An Efficient Heterogeneous Catalyst for the Synthesis of 1, 8-Dioxo-octahydroxanthenes." E-Journal of Chemistry 7, no. 3 (2010): 717–20. http://dx.doi.org/10.1155/2010/936107.

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1,8-Dioxo-octahydroxanthenes have been synthesized good yields via a reaction of aldehydes and dimedone in the presence of cellulose sulfonic acid as a heterogeneous catalyst under solvent-free condition.

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6

Ehsanifar, Sepideh, and Masoud Mokhtary. "3-Carboxy-1-sulfopyridin-1-ium chloride ([CPySO3H]+Cl−): an efficient catalyst for one-pot synthesis of hexahydroquinoline-3-carboxamides." Heterocyclic Communications 24, no. 1 (2018): 27–29. http://dx.doi.org/10.1515/hc-2017-0211.

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Abstract 3-Carboxy-1-sulfopyridin-1-ium chloride ([CPySO3H]+Cl−) was synthesized and evaluated as a recoverable catalyst for one-pot synthesis of hexahydroquinoline-3-carboxamide derivatives by a four-component reaction of an arylaldehyde, dimedone, acetoacetanilide and ammonium acetate. The [CPySO3H]+Cl− catalyst was characterized by infrared (IR), 1H nuclear magnetic resonance (NMR), 13C NMR, elemental analysis and thermal gravimetric analysis (TGA).

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7

Andin, A. N., and M. A. Engelgardt. "Synthesis of Functionalized Spiro[1-benzofuran-2,5'-pyrimidine] Derivatives of 5-Arylidenebarbituric Acids." Russian Journal of Organic Chemistry 60, no. 11 (2024): 2125–29. https://doi.org/10.1134/s1070428024110058.

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Abstract Adducts of dimedone and 5-arylidenebarbituric acids react with N-bromosuccinimide in aqueous ethanol to give functionalized spiro[1-benzofuran-2,5'-pyrimidine] derivatives with moderate yields. The reaction of 5-benzylidenebarbituric acid with ethyl acetoacetate in the presence of N-bromosuccinimide provides spiro[pyrimidine-5,6'-furo[2,3-d]pyrimidine].

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8

Abdelhamid, Ismail, Ahmed Elwahy, and Hadeer Diab. "ZnO-Nanoparticles-Catalyzed Synthesis of Poly(tetrahydrobenzimidazo[2,1-b]quinazolin-1(2H)-ones) as Novel Multi-armed Molecules." Synlett 29, no. 12 (2018): 1627–33. http://dx.doi.org/10.1055/s-0037-1609967.

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A new series of poly(tetrahydrobenzimidazo[2,1-b]-quinazolin-1(2H)-ones) was synthesized in good yields using a multicomponent reaction of poly(aldehydes), dimedone, and 2-aminobenzimidazole in DMF under conventional heating as well as under microwave irradiation.

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9

Naby, Hisham A. Abdel, Ramadan A. Mekheimer, Afaf M. Abd-Elhameed, and Kamal U. Sadek. "A Convenient One-pot Synthesis of Pyrimido[4,5-b]quinolines as 5-Deaza Non-classical Antifolate Inhibitors." Journal of Chemical Research 23, no. 11 (1999): 678–79. http://dx.doi.org/10.1177/174751989902301121.

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A convenient one-pot synthesis of pyrimido[4,5- b]quinolines as non-classical 5-deaza antifolate inhibitors by the reaction of 6-amino-4-oxo-2-thioxotetrahydropyrimidine 1 with aromatic aldehydes and dimedone is reported.

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10

Piralghar, Zahra Abdi, Mohammad Mahmoodi Hashemi, and Ali Ezabadi. "Synthesis and Characterization of a Novel Ionic Liquid Based on N,N,N,N-tetramethylethylenediamine and its Application in the Synthesis of 1,8-dioxo-octahydro Xanthenes." Combinatorial Chemistry & High Throughput Screening 21, no. 7 (2018): 526–32. http://dx.doi.org/10.2174/1386207321666180828092546.

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Aim and Objective: In this work, we synthesized and characterized a novel Brönsted acidic ionic liquid from the reaction of N, N, N’, N’-tetramethylethylenediamine with chlorosulfonic acid and explored its catalytic activity in 1, 8-dioxo-octahydroxanthenes synthesis. Materials and Methods: Dimedone, aryl aldehydes, and the ionic liquid as the catalyst were reacted under solvent-free conditions. The progressive of the reaction was monitored by a thin layer of chromatography (ethyl acetate/n-hexane = 1/5). All products were characterized as the basis of their spectra data and melting point by comparison with those reported in the literature. Results: The prepared ionic liquid was successfully applied in the synthesis of 1, 8-dioxooctahydroxanthenes in good to high yields on the reaction of aryl aldehyde and dimedone at 120oC under solvent-free conditions. Conclusion: This research demonstrates that the catalyst is impressive for 1, 8-dioxo-octahydroxanthenes synthesis under solvent-free conditions.

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Book chapters on the topic "Dimedone 1"

1

El Ashry, El Sayed H., Laila F. Awad, Yeldez El Kilany, and Elsayed I. Ibrahim. "Chapter 1 Dimedone: A Versatile Precursor for Annulated Heterocycles." In Advances in Heterocyclic Chemistry Volume 98. Elsevier, 2009. http://dx.doi.org/10.1016/s0065-2725(09)09801-8.

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