Academic literature on the topic 'Β-enaminones'

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Journal articles on the topic "Β-enaminones"

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Liu, Weibing, Cui Chen та Qing Zhang. "FeCl3-PTSA Co-Catalysed Highly Regio- and Stereo-Selective Synthesis of β-Functionalised Enamine Derivatives". Journal of Chemical Research 36, № 3 (2012): 175–77. http://dx.doi.org/10.3184/174751912x13306054094882.

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β-Enaminone derivatives are useful synthetic precursors. β- N-Substituted ( E)-enaminones and β-N-substituted ( E)-aminoacrylates were synthesised with high regio- and stereo-selectivity via using the co-catalytic system of FeCl3/PTSA, which also provides a new way to the formation of C–O bond.
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Wang, Delong, та Hui Shi. "An Unexpected Reaction of Isodehydracetic Acid with Amines in the Presence of 1-Ethyl-3-(3-dimethylaminopropyl) Carbodiimide Hydrochloride Yields a New Type of β-Enaminones". Molecules 25, № 9 (2020): 2131. http://dx.doi.org/10.3390/molecules25092131.

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The reaction of isodehydracetic acid with amines was serendipitously found to afford β-enaminones in the presence of the coupling agent 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC). Under the optimal reaction condition, 23 examples of α-aminomethylene glutaconic anhydride were obtained at approximately 30−80% yields. This is a concise, operationally simple method to expediently synthesize a new type of β-enaminone-containing compound.
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Faisal, Ali, Enass J. Waheed та Awf A. Ahmed. "Diverse Applications of β-enaminone Ligands and their Metal Complexes: A Review ‎Article". Al-Kitab Journal for Pure Sciences 7, № 2 (2023): 130–52. http://dx.doi.org/10.32441/kjps.07.02.p11.

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As they include both nucleophilic and electrophilic moieties on the same skeleton, enaminones are an important subclass of chemical compounds that contain conjugated NC=C-C=O fragments. These active sites aid in the production of organic molecules containing linear or cyclic heteroatoms. Enaminones and the chemica1 compounds produced from them are both biologically active against the most dangerous bacteria. As a result, they have been utilized as starting materials for the synthesis of anti-inf1ammatory, antibacteria1, anticonvulsant, anticancer, anti-urease, anti-malaria1, optically luminesc
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Delbecq, Philippe, Daniel Bacos, Jean Pierre Celerier та Gérard Lhommet. "Boric acid: a new regiospecific decarboxylating agent. Syntheses of cyclic imines, β-enaminones, and β-enaminodiketones from β-enaminoesters". Canadian Journal of Chemistry 69, № 8 (1991): 1201–6. http://dx.doi.org/10.1139/v91-179.

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The synthesis of cyclic imines 2, β-enaminones 6, and β-enaminodiketones 7 is described. Regio- and stereospecific thermolysis of β-enaminoesters 4 with boric acid permit these preparations in generally good yields.Key words: boric acid, cyclic β-enaminoesters, decarboxylation, cyclic imines, cyclic β-enaminones.
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Omid Marvi, Omid Marvi, and Sattar Arshadi and Bita Baghernejad Sattar Arshadi and Bita Baghernejad. "Lactic, Malic, Tartaric, Citric and Ascorbic Acid as Natural and Green Organocatalysts for Microwave-Induced Solvent-Free Synthesis of Enaminones." Journal of the chemical society of pakistan 46, no. 4 (2024): 400. http://dx.doi.org/10.52568/001509/jcsp/46.04.2024.

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The enaminone framework is a versatile building block used in organic synthesis. Herein, a series of β-enaminones were synthesized in good to excellent yields from the reaction of various aliphatic and aromatic primary amines with 1,3-dicarbonyl compounds using common natural organic acids (lactic, malic, tartaric, citric and ascorbic acid) as green, eco-friendly and efficient catalysts under microwave irradiation and solvent-free conditions.
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Ciber, Luka, Franc Požgan, Helena Brodnik, Bogdan Štefane, Jurij Svete, and Uroš Grošelj. "Synthesis and Catalytic Activity of Organocatalysts Based on Enaminone and Benzenediamine Hydrogen Bond Donors." Catalysts 12, no. 10 (2022): 1132. http://dx.doi.org/10.3390/catal12101132.

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A total of 24 novel organocatalysts based on (S)-quininamine as a chiral tertiary amine and on enaminone or 1,2-benzenediamine as hydrogen bond donors were synthesized. The enaminone-type catalysts were prepared by the transamination of N,N-dimethyl enaminones with (S)-quininamine (9 examples) and the 1,2-benzenediamine-type catalysts were prepared in 3 steps from (S)-quininamine and ortho-fluoronitrobenzene derivatives (15 examples). Their organocatalytic activity was evaluated in the Michael addition of acetylacetone to trans-β-nitrostyrene. Enantioselectivities of up to 72% ee were observed
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Karadeniz, Eda, та Metin Zora. "One-Pot Synthesis of Spiro-2H-pyrroles from N-Propargylic β-Enaminones". Synlett 30, № 10 (2019): 1231–36. http://dx.doi.org/10.1055/s-0037-1611816.

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A simple and general one-pot method for the synthesis of spiro-2H-pyrroles has been developed. Initially, cyclohexane-embedded β-enaminones with internal alkyne functionality were synthesized by conjugate addition of 1-ethynylcyclohexylamine to α,β-alkynic ketones, followed by palladium-catalyzed coupling of the resulting N-propargylic β-enaminones with aryl iodides. When subjected to basic conditions, the cyclohexane-embedded β-enaminones with internal alkyne functionality underwent tandem nucleophilic cyclization and benzylic C–H oxidation to furnish 3,4-diaryloyl-1-azaspiro[4.5]deca-1,3-die
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Wang, Jiateng, Yunqing Zhuang, Jie Zhao, et al. "Copper-catalyzed direct sulfenoamination of saturated ketones via in situ formed enaminones." Organic & Biomolecular Chemistry 20, no. 8 (2022): 1749–53. http://dx.doi.org/10.1039/d1ob02469h.

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Luo, Tian, Jie-Ping Wan та Yunyun Liu. "Toward C2-nitrogenated chromones by copper-catalyzed β-C(sp2)–H N-heteroarylation of enaminones". Organic Chemistry Frontiers 7, № 9 (2020): 1107–12. http://dx.doi.org/10.1039/d0qo00065e.

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The synthesis of C2-nitrogenated chromones has been performed via reactions of enaminones and nitrogen nucleophiles based on an unconventional β-C–H bond functionalization and a featured chromone annulation of enaminones.
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Tarasenko, Karen V., Igor I. Gerus, Valery P. Kukhar та Vitaly V. Polovinko. "Reactions of β-aminovinyl bromodifluoromethyl ketones with alkyl phosphites: Perkow versus Arbuzov". Collection of Czechoslovak Chemical Communications 74, № 2 (2009): 335–46. http://dx.doi.org/10.1135/cccc2008095.

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New bromodifluoromethyl enaminones 1a–1f and γ-bromo-β-morpholinopropenyl fluoromethyl ketones 2a, 2b were synthesized. N-Substituted bromodifluoromethyl enaminones 1a–1d do not react with triethyl or diethyl phosphites, whereas N-acylated enaminones 1e, 1f gave difluorodienyl phosphates 4a, 4b as Perkow rearrangement products. Fluoroketone 2a reacts easily with triethyl phosphite according to the Arbuzov protocol and a perspective building block – trifluoromethyl-containing phosphonate 7a is formed.
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Dissertations / Theses on the topic "Β-enaminones"

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González, Soria María José. "Selective synthesis and reactivity of indolizines." Doctoral thesis, Universidad de Alicante, 2018. http://hdl.handle.net/10045/98672.

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Se ha llevado a cabo la síntesis multicomponente de una serie de 1-aminoindolizinas y pirrolo[1,2-a]quinolonas de manera efectiva a partir de derivados de 2-piridincarbaldehído, aminas secundarias y alquinos terminales utilizando CuNPs/C como catalizador en diclorometano a 70 ºC. La metodología se ha aplicado a una variedad de aminas y alquinos, los últimos incluyendo arilacetilenos así como alquilacetilenos, con rendimientos de moderados a altos. Dicho catalizador ha demostrado ser superior a una serie de catalizadores de cobre comerciales. Finalmente, se ha propuesto un mecanismo de reacción
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Moreira, Dayse das Neves. "Síntese de pirazóis e desenvolvimento de novos líquidos iônicos derivados de componentes farmacologicamente ativos." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/4214.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The synthesis of two series of N-substituted pyrazoles from the cyclocondensation reaction of β-enaminones ([R1C(O)C(R2)=CHN(Me2)], where R1 = Me, C6H5, 3-MeOC6H4, 4-Me-C6H4, 4-MeO-C6H4, 4-F-C6H4, 4-Cl-C6H4, 4-Br-C6H4, 4-O2N-C6H4, fur-2-il, thien-2-il; R2 = H, 2-MeO-C6H4) and 2-hydroxyethylhydrazine or 1-pentafluorophenylhydrazine was demonstrated. The reactions were performed in five ionic liquids ([BMIM][BF4], [BMIM][Br], [BMIM][OH], [HMIM][HSO4] e [BPy][BF4]) with different physical and chemical properties to establish the
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Paveglio, Guilherme Caneppele. "Estudo de parâmetros reacionais em moinho de bolas na síntese de aril(heteroaril)-1h-pirazóis." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/10532.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>This paper describes a study of reaction parameters in a ball mill in the synthesis of 1H-pyrazole acid catalyzed. The studied parameters were: amount of reactants, frequency, reaction time, amount of catalyst, number of milling balls, different catalysts, diameter and material of the milling balls. Another study was conducted to study the mechanism of solid-solid reaction involved in the cyclocondensation between enaminones and hydrazine hydrochloride acid catalyzed. These mixtures were studied by thermal analysis (TGA and
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Campos, Patrick Teixeira. "β-Enaminonas, 5-hidróxi-4,5-diidropirazóis e 5-Hidróxi-4,5-diidroisoxazóis halometilsubstituídos: estudo molecular por difração de raios-x". Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/10435.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The molecular study by X-ray diffraction of β-aminovinyl ketones [R3C(O)CH=C(R1)N(R4R5), onde R3 = CF3, CCl3, CHCl2; R1 = H, Me; R4 = H; R5 = benzyl, Ph, 5-methylisoxazol-3-yl; R4, R5 = -(CH2)4-, -(CH2)2O(CH2)2-], methyl 5- hydroxy-5-trihalomethyl-4,5-dihydro-1H-pyrazole-1-carboxylate [3-(R1), 4-(R2), and 5- (R3) substituted, where R1 = H, Me; R2 = H, Me; R3 = CCl3, CF3], 1-cyanoacetyl-5- trifluorometyl-5-hydroxy-4,5-dihydro-1H-pyrazole [3-(R1) and 4-(R2) substituted, where R1 = H, Ph; R1, R2 = -(CH2)4-, R2 = H] and 5-triclorometyl
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Conference papers on the topic "Β-enaminones"

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Hortelan, Cristiane Regina Winck, Ingridhy Ostaciana Maia Freitas da Silveira, Silvia Mendes de Souza, Adilson Beatriz, Roberto da Silva Gomes та Nelson Luís de Campos Domingues. "Synthesis of β-enaminones catalyzed by nanoparticles of Fe2O3 in ultrasound and solvent-free approach." У 15th Brazilian Meeting on Organic Synthesis. Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-15bmos-bmos2013_2013816163722.

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