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Relevant bibliographies by topics / 5-trione

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Journal articles

Academic literature on the topic '5-trione'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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Journal articles on the topic "5-trione"

1

Hanson, James R., Ismail Kiran, Natheer F. Masarweh, and Cavit Uyanik. "Preparation of Androst-5-ene-4,7,17-trione and A-Norandrost-5-ene-3,7,17-trione." Journal of Chemical Research, no. 9 (1998): 493. http://dx.doi.org/10.1039/a803764g.

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2

Hanson, James R., Ismail Kiran, Natheer F. Masarweh, and Cavit Uyanik. "ChemInform Abstract: Preparation of Androst-5-ene-4,7,17-trione and A-Norandrost-5-ene-3,7,17-trione." ChemInform 30, no. 15 (2010): no. http://dx.doi.org/10.1002/chin.199915226.

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3

Bartke, Michael, and Wolfgang Pfleiderer. "Pteridines, XC Syntheses, Oxidations, Properties, and Reactions of 2-Thiopteridine-4,6, 7- trione Derivatives." Pteridines 1, no. 2 (1989): 83–90. http://dx.doi.org/10.1515/pteridines.1989.1.2.83.

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Summary A new efficient synthesis for 2-thiopteridine-4,6,7-triones (6-10, 15) has been found in the condendation of the appropriate 5,6-diaminopyrimidine (1-5, 14) with oxalic acid in DMF. Analogous condensations with dimethyl oxalate led to S-alkylation probably via an intermediate O-methylation of the DMF. 8-Methyl-2- thiopteridine-4,6,7-trione (10) shows a ring contraction to 9-methyl-2-thioxanthine (13) on base treatment. Oxidations by H20 2 and KMn04 respectively lead to the corresponding 2-sulfinate 22 and the 2-sulfonates 17 -19. Oxidative desulfurization takes place in formic acid wit

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4

Kobyzhcha, N. I., V. S. Pyliavskyi, V. V. Sukhoveev, and V. I. Kashkovskyi. "Derivatives of pyrimidine-2,4,6-triones as components of additives to increase the lubricating properties of motor fuels." Catalysis and petrochemistry, no. 30 (2020): 97–101. http://dx.doi.org/10.15407/kataliz2020.30.097.

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One of the important tasks of modern petrochemistry is the development of new additives that can improve the performance of motor fuels. With the expansion of the number of automotive and agricultural machinery and increasing its technical level, the demand for a wider range of petroleum products is increasing and, as well, the requirements for their quality are increasing. As the environmental and operational requirements for motor fuels are constantly increasing, it is necessary to find new, more efficient additives. The paper describes the synthesis of spirocyclic pyrimidine-2,4,6-trionеs b

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5

Fazldeen, H. "Oxidation of Isomuellitol and Hexahydromuellitol With Chromium Trioxide." Australian Journal of Chemistry 40, no. 5 (1987): 999. http://dx.doi.org/10.1071/ch9870999.

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Chromate oxidation of isomuellitol (2) led cleanly to the production of a cyclic trione , 2,2,9,9,15,15-hexamethyl- 1,8,14-trioxatrispiro [4.1.4.1.4.l]octadecane-6,12,18-trione (4), but the product derived from hexahydromuellitol (3) was an unexpected γ-lactone, 4-hydroxy-2,4-bis(3′-methylbutyl )-3-(4″-methyl-1″-oxopentyloxy)-5-oxotetrahydrofuran-2-carboxylic acid (5).

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6

Al-Sheikh, Ahmad, Kamal Sweidan, Norbert Kuhn, Cäcilia Maichle-Mößmer, and Manfred Steimann. "Elimination of a Thiomethyl Substituent from an Anionic 5-Methylenebarbituric Acid Derivative by Oxidation and Substitution." Zeitschrift für Naturforschung B 64, no. 3 (2009): 307–12. http://dx.doi.org/10.1515/znb-2009-0309.

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Triethylammonium 5-[(1,3-dimethyl-2,4,6-trioxo-tetrahydropyrimidin-5(6H)-ylidene)-(methylthio) methyl]-1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-olate (5), obtained from 5-[bis (methylthio)methylene]-1,3-dimethyl-2,4,6(1H,3H,5H)-pyrimidinetrione (2) and 1,3-dimethylbarbituric acid in the presence of triethylamine, is protonated by methanesulfonic acid to give 5,5ʹ-(methylthiomethanediylidene)bis(1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione) (6) in good yield. Compound 6 is oxidized in two steps by m-chloroperbenzoic acid to give 5,5ʹ- (methylsulfinylmethanediylidene)bis(1,3-dimethy

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7

Collins, DJ, та NE Krause. "Monoacetals Derived From 12-α-Hydroxyandrosta-1,4-diene-3,17-dione and Androsta-1,4-diene-3,12,17-trione". Australian Journal of Chemistry 41, № 6 (1988): 985. http://dx.doi.org/10.1071/ch9880985.

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Conversion of 12α-hydroxyandrosta-1,4-diene-3,17-dione (5) into the corresponding 17-cyclic ethylene acetal (1) was accompanied by acid- catalysed attack of ethylene glycol at C3 to give 17,17-ethylenedioxy- 3-(2′-hydroxyethoxy)-1-methylestra-1,3,5(10)-trien-12a-ol (2), which was the major product with prolonged reaction times. Exchange dioxolanation of androsta-1,4-diene-3,12,17-trione (8), prepared by Jones oxidation of (5), gave selectively the 12-monoacetal (9): the regioisomeric 17-monoacetal (4) was obtained by oxidation of the hydroxy acetal (1) with chromium trioxide in pyridine. The t

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8

Gohain, Mukut, Theunis J. Muller, and Barend C. B. Bezuidenhoudt. "5-(3,4-Dimethoxybenzylidene)-1,3-dimethyl-1,3-diazinane-2,4,6-trione." Acta Crystallographica Section E Structure Reports Online 68, no. 1 (2011): o179. http://dx.doi.org/10.1107/s1600536811052986.

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9

Lewis, William, Robert H. McKeown, and Ward T. Robinson. "(\pm)-5-Ethyl-1-methyl-5-phenylpyrimidine-2,4,6-trione at 163 K." Acta Crystallographica Section E Structure Reports Online 61, no. 4 (2005): o799—o800. http://dx.doi.org/10.1107/s1600536805005593.

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10

Hökelek, Tuncer, Zeynel Seferoğlu, Ertan Şahin, and Nermin Ertan. "5-[(5-Methylthiazol-2-yl)diazenyl]pyrimidine-2,4,6(1H,3H,5H)-trione." Acta Crystallographica Section E Structure Reports Online 63, no. 3 (2007): o1506—o1508. http://dx.doi.org/10.1107/s1600536807009051.

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In the molecular structure of the title compound, C8H7N5O3S, the thiazole ring is oriented with respect to the barbituric acid ring at a dihedral angle of 5.14 (9)°. In the crystal structure, intermolecular N—H...N and N—H...O hydrogen bonds link the molecules, forming a layer parallel to the ac plane.

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