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Relevant bibliographies by topics / 4-Michael addition reaction

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Journal articles

Academic literature on the topic '4-Michael addition reaction'

Author: Grafiati

Published: 24 April 2022

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Journal articles on the topic "4-Michael addition reaction"

1

Bayly, C. I., and F. Grein. "Comparison of an intramolecular Michael-type addition with its intermolecular counterpart: an abinitio theoretical study." Canadian Journal of Chemistry 67, no. 12 (1989): 2173–77. http://dx.doi.org/10.1139/v89-337.

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Abinitio theoretical calculations were carried out on the intramolecular addition of 3-ketopent-4-en-1-olate 1 to form 1-oxacyclohex-3-en-4-olate 2 (reaction I; Scheme 1) and the corresponding intermolecular Michael addition of methanolate to butenone forming 4-methoxybut-2-en-2-olate 4 (reaction II; Scheme 1). The calculations were carried out at the RHF level using an augmented 4-31G basis set; single point energies were then taken using the 6-31 + G* basis set. The overall energy change of the reaction in going from reactants to products is very similar for both reactions, with products bei

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2

Yang, Xianjin, Yong Guo, Qi Wang та Qing-Yun Chen. "[RuH2(PPh3)4]-Catalyzed Michael Addition Reaction of α-Fluoronitroalkanes". Synthesis 44, № 24 (2012): 3815–21. http://dx.doi.org/10.1055/s-0032-1317526.

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3

Li, Zheng, Wenli Song, Jiaojiao He, Yan Du, and Jingya Yang. "Synthesis of 4-arylethyl-6-arylpyrimidine-2-thiols through aza-Michael addition/nucleophilic addition/aromatization tandem reactions." Heterocyclic Communications 24, no. 1 (2018): 23–26. http://dx.doi.org/10.1515/hc-2017-0169.

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Abstract An efficient method for the synthesis of the title compounds by reactions of divinyl ketones with thiourea is described. This protocol has the advantages of high yields, mild reaction conditions and simple work-up procedure.

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4

Li, Zheng-Yi, Hong-Xiao Tong, Yuan Chen, et al. "Asymmetric Michael addition reactions catalyzed by calix[4]thiourea cyclohexanediamine derivatives." Beilstein Journal of Organic Chemistry 14 (July 25, 2018): 1901–7. http://dx.doi.org/10.3762/bjoc.14.164.

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A number of upper rim-functionalized calix[4]thiourea cyclohexanediamine derivatives have been designed, synthesized and used as catalysts for enantioselective Michael addition reactions between nitroolefins and acetylacetone. The optimal catalyst 2 with a mono-thiourea group exhibited good performance in the presence of water/toluene (v/v = 1:2). Under the optimal reaction conditions, high yields of up to 99% and moderate to good enantioselectivities up to 94% ee were achieved. Detailed experiments clearly showed that the upper rim-functionalized hydrophobic calixarene scaffold played an impo

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5

Boncel, Sławomir, Kinga Saletra, Barbara Hefczyc, and Krzysztof Z. Walczak. "Michael-type addition of azoles of broad-scale acidity to methyl acrylate." Beilstein Journal of Organic Chemistry 7 (February 8, 2011): 173–78. http://dx.doi.org/10.3762/bjoc.7.24.

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An optimisation of Michael-type addition of azole derivatives of broad-scale acidity – ranging from 5.20 to 15.00 pK a units – namely 4-nitropyrazole, 3,5-dimethyl-4-nitropyrazole, 4(5)-nitroimidazole, 4,5-diphenylimidazole, 4,5-dicyanoimidazole, 2-methyl-4(5)-nitroimidazole, 5(4)-bromo-2-methyl-4(5)-nitroimidazole and 3-nitro-1,2,4-triazole to methyl acrylate as an acceptor was carried out. The optimisation process involved the use of an appropriate basic catalyst (DBU, DIPEA, NaOH, NaH, TEDA), a donor/base/acceptor ratio and the reaction temperature. The reactions were performed in DMF as so

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6

Mo, Xiu-Fang, Chang-Feng Xiong, Ze-Wen Chen, et al. "Zinc complexes supported by pyridine-N-oxide ligands: synthesis, structures and catalytic Michael addition reactions." Dalton Transactions 49, no. 35 (2020): 12365–71. http://dx.doi.org/10.1039/d0dt00185f.

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Zinc complexes supported by pyridine-N-oxide ligands show highly efficient catalysis for Michael addition reaction. The NMR and MS experiments analysis displays intermediate [Zn(SR)<sub>2</sub>(HSR)<sub>4</sub>] has real catalytic activity for the addition reactions.

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7

Lei, Jie, Yong Li, Liu-Jun He, et al. "Expeditious access of chromone analogues via a Michael addition-driven multicomponent reaction." Organic Chemistry Frontiers 7, no. 8 (2020): 987–92. http://dx.doi.org/10.1039/d0qo00145g.

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A Michael addition-driven four-component reaction (4-CR) with four Ugi inputs was developed and utilized for the synthesis of chromone derivatives and tetrazole substituted chromones under mild reaction conditions.

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8

Wang, Qi, Qing-Yun Chen, Xianjin Yang та Yong Guo. "ChemInform Abstract: [RuH2(PPh3)4]-Catalyzed Michael Addition Reaction of α-Fluoronitroalkanes." ChemInform 44, № 18 (2013): no. http://dx.doi.org/10.1002/chin.201318047.

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9

Dao Cai Wang, Dao Cai Wang, Yi Luo Yi Luo, Jian Jun Li Jian Jun Li, and Chi Zhang and Xiao Peng Liu Chi Zhang and Xiao Peng Liu. "Efficient Construction of 4-aryl-5,8-epiminobenzo[7]annulenes based on a Cascade Michael/Cyclization Reaction." Journal of the chemical society of pakistan 43, no. 3 (2021): 322. http://dx.doi.org/10.52568/000573/jcsp/43.03.2021.

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A practical method was developed for the gain of potentially biologically active 4-aryl-5,8-epiminobenzo[7]annulenes using tropinone as starting material with an azabicyclo[3.2.1]octan skeleton. In an effort to improve product yield, reaction process conditions were optimized and the cascade Michael/cyclization reaction went most smoothly using tetrahydrofuran as solvent in the presence of DBU at 60and#176;C for 10 hours. More diverse 4-aryl-5,8-epiminobenzo[7]annulenes were synthesized in good yields and structurally identified by NMR, FTIR and mass spectrometry analysis. The assembly of the

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10

Dao Cai Wang, Dao Cai Wang, Yi Luo Yi Luo, Jian Jun Li Jian Jun Li, and Chi Zhang and Xiao Peng Liu Chi Zhang and Xiao Peng Liu. "Efficient Construction of 4-aryl-5,8-epiminobenzo[7]annulenes based on a Cascade Michael/Cyclization Reaction." Journal of the chemical society of pakistan 43, no. 3 (2021): 322. http://dx.doi.org/10.52568/000573.

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Abstract:

A practical method was developed for the gain of potentially biologically active 4-aryl-5,8-epiminobenzo[7]annulenes using tropinone as starting material with an azabicyclo[3.2.1]octan skeleton. In an effort to improve product yield, reaction process conditions were optimized and the cascade Michael/cyclization reaction went most smoothly using tetrahydrofuran as solvent in the presence of DBU at 60and#176;C for 10 hours. More diverse 4-aryl-5,8-epiminobenzo[7]annulenes were synthesized in good yields and structurally identified by NMR, FTIR and mass spectrometry analysis. The assembly of the

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