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Journal articles on the topic 'Diethyl-Dimethyl Malonates'

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Published: 4 June 2021
Last updated: 1 February 2022

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1

Bakó, Péter, Tamás Nemcsok, Zsolt Rapi, and György Keglevich. "Enantioselective Michael Addition of Malonates to Enones." Current Organic Chemistry 24, no. 7 (2020): 746–73. http://dx.doi.org/10.2174/1385272824666200316122221.

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: Many catalysts were tested in asymmetric Michael additions in order to synthesize enantioenriched products. One of the most common reaction types among the Michael reactions is the conjugated addition of malonates to enones making it possible to investigate the structure–activity relationship of the catalysts. The most commonly used Michael acceptors are chalcone, substituted chalcones, chalcone derivatives, cyclic enones, while typical donors may be dimethyl, diethyl, dipropyl, diisopropyl, dibutyl, di-tert-butyl and dibenzyl malonates. This review summarizes the most important enantioselec
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2

Klásek, Antonín, Stanislav Kafka, and Thomas Kappe. "Synthesis and Some Reactions of 3-Substituted 1,4-Bis(4-hydroxy-2-oxo-1,2-dihydroquinolin-6-yloxy)butanes." Collection of Czechoslovak Chemical Communications 60, no. 12 (1995): 2137–46. http://dx.doi.org/10.1135/cccc19952137.

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Condensations of 1,4-bis(4-aminophenoxy)butane Ia and its N,N'-dimethyl derivative Ib with substituted diethyl malonates gave 1,4-bis(4-hydroxy-2-oxo-1,2-dihydroquinolin-6-yloxy)butanes IIa-IIf. From these compounds, 1,4-bis(3-halogeno-2,4-dioxo-1,2,3,4-tetrahydroquinolin-6-ylox y)butanes IIIa-IIIg and 1,4-bis(3-hydroxy-2,4-dioxo-1,2,3,4-tetrahydroquinolin-6-yloxy )butanes IIIh-IIIm were prepared.
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3

Breznik, Matej, and Danijel Kikelj. "Pig liver esterase catalyzed hydrolysis of dimethyl and diethyl 2-methyl-2-(o-nitrophenoxy)malonates." Tetrahedron: Asymmetry 8, no. 3 (1997): 425–34. http://dx.doi.org/10.1016/s0957-4166(96)00535-6.

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4

BREZNIK, M., and D. KIKELJ. "ChemInform Abstract: Pig Liver Esterase Catalyzed Hydrolysis of Dimethyl and Diethyl 2- Methyl-2-(o-nitrophenoxy)malonates." ChemInform 28, no. 24 (2010): no. http://dx.doi.org/10.1002/chin.199724045.

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5

Kumar, Anuj, Sabindra K. Samal, Rupesh Dash, and Umaprasana Ojha. "Polyacryloyl hydrazide based injectable & stimuli responsive hydrogels with tunable properties." J. Mater. Chem. B 2, no. 42 (2014): 7429–39. http://dx.doi.org/10.1039/c4tb01257g.

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The synthesis and characterization of a series of injectable and stimuli responsive hydrogels based on polyacryloyl hydrazide have been accomplished using dimethyl 2,2′-thiodiacetate, acrylic acid, diethyl malonate and polyethylene glycol diacrylate as cross-linkers through a chemical or dual cross-linking pathway.
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6

Slavíková, Barbora, та Alexander Kasal. "Epalons: Synthesis of New 16α-Carboxymethyl Derivatives". Collection of Czechoslovak Chemical Communications 64, № 9 (1999): 1479–84. http://dx.doi.org/10.1135/cccc19991479.

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The title compounds (16α-carboxymethyl-3α-hydroxy-5α-pregnan-20-one and its sodium and triethylammonium salts) were prepared from 20-oxopregna-5,16-dien-3β-yl acetate by conjugate addition of dimethyl malonate and decarboxylation. Inversion of configuration at carbon C-3 was carried out by Mitsunobu acylation with diethyl azodicarboxylate and formic acid in the presence of triphenylphosphine.
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7

Hřebabecký, Hubert, and Antonín Holý. "Synthesis of Carba Analogues of Deoxy-4-C-(hydroxymethyl)hexopyranoses, Intermediates in the Synthesis of Carbocyclic Nucleosides." Collection of Czechoslovak Chemical Communications 66, no. 5 (2001): 785–98. http://dx.doi.org/10.1135/cccc20010785.

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3-O-Benzyl-1,2-O-isopropylidene-α-D-glucofuranose-5,6-O-sulfate (1) was treated with sodium salt of dimethyl malonate to obtain, after hydrolysis, methyl 5-(3-O-benzyl-1,2-O-isopropylidene-α-D-erythrofuranos-4-yl)-2-oxotetrahydrofuran-3-carboxylate (3) which was converted to the mixture of methyl (2S,3R,4R)- (7) and (2R,3R,4R)-2-(acetyloxy)-3-(benzyloxy)-4-(formyloxy)-7-oxo-6-oxabicyclo[3.2.1]octane-1-carboxylate (8). The compound 7 was reduced with lithium aluminium hydride to give (1R,2R,3R,4S)-3-(benzyloxy)-5,5-bis(hydroxymethyl)cyclohexane-1,2,4-triol (9) which was transformed to (1R,2S,4R
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8

Vrbková, Silvie, Martin Dračínský, and Antonín Holý. "Bifunctional Acyclic Nucleoside Phosphonates: 2. Symmetrical 2-{[Bis(phosphono)methoxy]methyl}ethyl Derivatives of Purines and Pyrimidines." Collection of Czechoslovak Chemical Communications 72, no. 7 (2007): 965–83. http://dx.doi.org/10.1135/cccc20070965.

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Novel bisphosphonate alkylating agent, tetraisopropyl {2-[(mesyloxy)methyl]propane-1,3-diyl}bis(oxymethylene)bisphosphonate 19, was synthesized from diethyl 2,2-bis(hydroxymethyl)malonate. Decarbethoxylation of the diethyl 2,2-dimethyl-1,3-dioxane-5,5-dicarboxylate was followed by chloromethylation of 2-[(benzyloxy)methyl]propane-1,3-diol and Arbuzov reaction with triisopropyl phosphite. Bisphosphonate building block 19 was used in the alkylation of various nucleobases (2-amino-6-chloropurine, adenine, 2-amino-6-(cyclopropyl)aminopurine, cytosine, uracil and 4-methoxy-5-methylpyrimidin-2(1H)-o
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9

VADI, MEHDI, and AZIM LORESTANI. "Adsorption Isotherms of Diethyl and Dimethyl Malonate Esters on Single –Walled Carbon Nanotubes." Oriental Journal Of Chemistry 28, no. 3 (2012): 1195–99. http://dx.doi.org/10.13005/ojc/280314.

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10

Valenta, Vladimír, Jiří Holubek, Emil Svátek, Vladimír Miller, Marie Vlková, and Miroslav Protiva. "2-Diethylaminoethyl esters of 1,3-disubstituted propane-2-carboxylic acids." Collection of Czechoslovak Chemical Communications 52, no. 10 (1987): 2534–44. http://dx.doi.org/10.1135/cccc19872534.

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Alkaline hydrolysis of diethyl 1-(tetrahydro-2-furyl)-3-(1-naphthyl)propane-2,2-dicarboxylate (IV) gave the crude acid V which was purified via the dipotassium salt and was obtained as the homogeneous higher melting crystal form. Its thermic decarboxylation yielded the acid II as a mixture of two racemates (38 : 62); crystallization led to the almost homogeneous racemate B (10 : 90). Reaction of the sodium salt of II with dimethyl sulfate in methanol gave the methyl ester III which afforded by ester exchange with 2-diethylaminoethanol the ester I (mixture of two racemates 34 : 66). 2-Diethylam
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11

Davey, John P., John R. Jones, and Erwin Buncel. "Kinetics of ionisation of carbon acids in non-aqueous media: detritiation of [2-3H1]diethyl malonate by heterocyclic bases." Canadian Journal of Chemistry 64, no. 6 (1986): 1246–49. http://dx.doi.org/10.1139/v86-207.

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To investigate proton transfer processes in non-aqueous media, two procedures have been developed of general applicability for the measurement of detritiation rates of carbon acids. One method is a variation of an existing solvent extraction procedure but with inclusion of a trace of trifluoroacetic acid, while the other involves the simple modification of a gas chromatograph so as to function as a radio-gas chromatograph. They have been established by studying the detritiation of [2-3H1]diethyl malonate in six different solvents (dimethylformamide, dimethyl sulfoxide, sulfolane, hexamethylpho
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12

Hu, Guangxiao, Wei Xiong, Haiyan Luo, et al. "Raman Spectroscopic Detection for Simulants of Chemical Warfare Agents Using a Spatial Heterodyne Spectrometer." Applied Spectroscopy 72, no. 1 (2017): 151–58. http://dx.doi.org/10.1177/0003702817719453.

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Raman spectroscopic detection is one of the suitable methods for the detection of chemical warfare agents (CWAs) and simulants. Since the 1980s, many researchers have been dedicated to the research of chemical characteristic of CWAs and simulants and instrumental improvement for their analysis and detection. The spatial heterodyne Raman spectrometer (SHRS) is a new developing instrument for Raman detection that appeared in 2011. It is already well-known that SHRS has the characteristics of high spectral resolution, a large field-of-view, and high throughput. Thus, it is inherently suitable for
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13

Swiderska, Agnieszka, Andrew M. Coney, Abdulaziz A. Alzahrani, et al. "Mitochondrial Succinate Metabolism and Reactive Oxygen Species Are Important but Not Essential for Eliciting Carotid Body and Ventilatory Responses to Hypoxia in the Rat." Antioxidants 10, no. 6 (2021): 840. http://dx.doi.org/10.3390/antiox10060840.

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Reflex increases in breathing in response to acute hypoxia are dependent on activation of the carotid body (CB)—A specialised peripheral chemoreceptor. Central to CB O2-sensing is their unique mitochondria but the link between mitochondrial inhibition and cellular stimulation is unresolved. The objective of this study was to evaluate if ex vivo intact CB nerve activity and in vivo whole body ventilatory responses to hypoxia were modified by alterations in succinate metabolism and mitochondrial ROS (mitoROS) generation in the rat. Application of diethyl succinate (DESucc) caused concentration-d
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14

Matković-Čalogović, D. "Structures of the mercuration products of dimethyl and diethyl malonate: Hg[CH(COOCH3)2]2 (I) and Hg[CH(COOCH2H5)2]2 (2)." Acta Crystallographica Section C Crystal Structure Communications 43, no. 8 (1987): 1473–75. http://dx.doi.org/10.1107/s0108270187091406.

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15

Alkubaisi, Abdulla, and Robert Shawt. "PHOSPHORUS-NITROGEN COMPOUNDS. PART 65.1 THE REACTIONS OF HEXACHLOROCYCLOTRI-PHOSPHAZATRIENE WITH DIETHYL BIS- (HYDROXYMETHYL)MALONATE. COMPARISON OF PRODUCT TYPE AND OF THE 31P, 1H AND 13C NUCLEAR MAGNETIC RESONANCE SPECTRA WITH THE SPIRO DERIVATIVES OF PROPANE- 1,3-DIOL AND 2,2-DIMETHYL-PROPANE-1,3-DIOL." Phosphorus, Sulfur, and Silicon and the Related Elements 55, no. 1 (1991): 49–57. http://dx.doi.org/10.1080/10426509108045921.

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