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Taherinia D, Mahmoodi MM, Fattahi A. Theoretical investigation of the effect of hydrogen bonding on the stereoselectivity of the Diels–Alder reaction. NEW J CHEM 2021. [DOI: 10.1039/d1nj01373d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here, we report the computational prediction of high exo selectivities in a series of Diels–Alder reactions with H-bonding interaction.
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Affiliation(s)
- Davood Taherinia
- Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran
| | - M. Mohsen Mahmoodi
- Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran
| | - Alireza Fattahi
- Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran
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2
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Sakata K, Fujimoto H. Roles of Lewis Acid Catalysts in Diels-Alder Reactions between Cyclopentadiene and Methyl Acrylate. ChemistryOpen 2020; 9:662-666. [PMID: 32685341 PMCID: PMC7269005 DOI: 10.1002/open.202000112] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/13/2020] [Indexed: 11/10/2022] Open
Abstract
The Diels-Alder reaction of cyclopentadiene with methyl acrylate catalyzed by AlCl3 has been theoretically investigated. M06-2X level DFT calculations have shown that the formation of two C-C bonds is asynchronous in the cycloaddition both in the endo path and in the exo path, thus making a good contrast to the well-known concept of [4+2] reactions based on the orbital symmetry arguments. It was found that the catalyst facilitates the cycloaddition and brings a higher endo selectivity in the highly asynchronous process, as compared with the reaction of the diene and the dienophile without the catalyst.
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Affiliation(s)
- Ken Sakata
- Faculty of Pharmaceutical Sciences Toho University Miyama, Funabashi, Chiba 274-8510 Japan
| | - Hiroshi Fujimoto
- Department of Molecular Engineering Graduate School of Engineering Kyoto University Katsura, Nishikyo-ku, Kyoto 615-8510 Japan
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3
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Tandon H, Chakraborty T, Suhag V. A New Scale of the Electrophilicity Index Invoking the Force Concept and Its Application in Computing the Internuclear Bond Distance. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619110040] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Salah M, Zeroual A, Jorio S, El Hadki H, Kabbaj OK, Marakchi K, Komiha N. Theoretical study of the 1,3-DC reaction between fluorinated alkynes and azides: Reactivity indices, transition structures, IGM and ELF analysis. J Mol Graph Model 2019; 94:107458. [PMID: 31726313 DOI: 10.1016/j.jmgm.2019.107458] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 11/17/2022]
Abstract
DFT/B3LYP/6-31 + g(d,p) calculations were performed and reactivity indices, transition structures theory were applied to elucidate the molecular mechanism of the reaction between fluorinated alkynes and different azides. The process of cycloaddition operates through a one-step mechanism and an asynchronous transition states. Examination of the energy profile in the gas phase show two possible 1,4 and 1,5 addition channels for amid, the former is preferred. Furthermore, the Parr functions have used to elucidate the reaction's regioselectivity. It was noted that the addition of solvent (DMSO) does not affect the regioselectivity of the reactions. Analysis of charge transfer in the transition structures shows a moderate polar character for the majority of the studied reactions. Moreover, the independent gradient model based on promolecular density (IGM) has been used to evaluate the asynchronicity of the formation of the two new sigma bonds. Finally, the ELF calculation has been performed to clearly describe the formation of the previous bonds along the IRC path.
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Affiliation(s)
- Mohammed Salah
- Molecular Modeling and Spectroscopy Research Team, Department of Chemistry, Faculty of Sciences, Chouaïb Doukkali University, P.O. Box 20, 24000, El Jadida, Morocco; Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Department of Chemistry, University Mohammed V, Faculty of Sciences, Avenue Ibn Battouta, B.P 1014, Rabat, Morocco.
| | - Abdellah Zeroual
- Molecular Modeling and Spectroscopy Research Team, Department of Chemistry, Faculty of Sciences, Chouaïb Doukkali University, P.O. Box 20, 24000, El Jadida, Morocco
| | - Souad Jorio
- Molecular Modeling and Spectroscopy Research Team, Department of Chemistry, Faculty of Sciences, Chouaïb Doukkali University, P.O. Box 20, 24000, El Jadida, Morocco
| | - Hamza El Hadki
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Department of Chemistry, University Mohammed V, Faculty of Sciences, Avenue Ibn Battouta, B.P 1014, Rabat, Morocco
| | - Oum Keltoum Kabbaj
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Department of Chemistry, University Mohammed V, Faculty of Sciences, Avenue Ibn Battouta, B.P 1014, Rabat, Morocco
| | - Khadija Marakchi
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Department of Chemistry, University Mohammed V, Faculty of Sciences, Avenue Ibn Battouta, B.P 1014, Rabat, Morocco
| | - Najia Komiha
- Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Department of Chemistry, University Mohammed V, Faculty of Sciences, Avenue Ibn Battouta, B.P 1014, Rabat, Morocco
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5
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Investigation of conventional and non-conventional hydrogen bonds: a comparison of fluorine-substituted and non-fluorine substituted compounds. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-017-2044-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Dizaji NJ, Nouri A, Zahedi E, Musavi SM, Nouri A. Regioselectivity of 1,3-dipolar cycloadditions between aryl azides and an electron-deficient alkyne through DFT reactivity descriptors. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-016-2663-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Karimi J. Effects of Solvent and Side-Chain Length on the Cycloaddition of Cyclopentadiene to N-alkylmaleimides: A Dft Study. PROGRESS IN REACTION KINETICS AND MECHANISM 2017. [DOI: 10.3184/146867816x14799161258398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Quantum chemistry calculations have been performed to investigate the kinetics and mechanism of the cycloaddition reaction between cyclopentadiene and N-alkylmaleimides in the gas phase and different solvents. To investigate the effects of side-chain length on the cycloaddition reaction, the rate constants and kinetic parameters of the reaction between cyclopentadiene with N-methyl-, N-ethyl-, N-propyl- and N-butyl-maleimide were calculated. The results obtained indicate that the reaction in solvents is faster than in the gas phase. Moreover, the dipole moments of the transition states are larger than those of the reactants. Therefore, the reactions in the most polar solvent (water) are faster than in ethanol, n-hexane, 2,2,2-trifluoroethanol (TFE) and acetonitrile. Quantum mechanics-molecular mechanics (QM/MM) calculations on the reactions using the explicit solvent model for water and TFE indicate that hydrogen bond interactions of the solvents have a key role in the rate of the reaction and these are more important than the polarity of the solvent. Natural bond orbital analysis reveals that the charge transfer between the reactants in solvents is more than in the gas phase. Finally, HOMO–LUMO analysis indicates that solvents increase the reactivity of the reactants in comparison to the gas phase.
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Affiliation(s)
- Javad Karimi
- Research and Development Centre, Golriz Company, Toos Industrial Park, Mashhad, Iran
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A conceptual DFT approach towards analysing feasibility of the intramolecular cycloaddition Diels-Alder reaction of triene amide in Lewis acid catalyst. J CHEM SCI 2016. [DOI: 10.1007/s12039-016-1138-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Wang M, Luo H, Zhang M, Wang J. Why trans- or cis-Dimethyl Fumarate Addition to 2,5-Dimethylpyrrole Gives Exclusively trans-7-Azanorbornane. J Phys Chem A 2015; 119:6563-73. [PMID: 25992596 DOI: 10.1021/acs.jpca.5b03872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The addition mechanism of dimethyl fumarate into 2,5-dimethylpyrrole is explored using density functional theory (DFT) methods. Our calculations find that TpW(NO)(PMe3)(η(2)-3H-2,5-dimethylpyrrole) prefers to undergo two TpW(NO)(PMe3) migrations, two 1,5-hydride migrations, and one reductive elimination to isomerize into TpW(NO)(PMe3)(η(2)-1H-2,5-dimethylpyrrole), in which TpW(NO)(PMe3) plays a proton-transfer role. trans-Dimethyl fumarate and TpW(NO)(PMe3)(η(2)-1H-2,5-dimethylpyrrole) tend to adopt a concerted cycloaddition manner to afford trans-7-azanorbornane with a free-energy barrier of 21.8 kcal/mol. cis-Dimethyl fumarate and TpW(NO)(PMe3)(η(2)-1H-2,5-dimethylpyrrole) are the most likely to experience a concerted cycloaddition → ring opening → ring closing process to provide trans-7-azanorbornane in which the concerted cycloaddition and the ring-opening process are in dynamic equilibrium (with similar energy barriers of 21.5 and 21.9 kcal/mol, respectively). The presence of TpW(NO)(PMe3) not only promotes the cycloaddition of trans- or cis-dimethyl fumarate with 2,5-dimethylpyrrole by donating d-electrons of the W atom into the diene system of the Diels-Alder reaction, but also is favorable for the ring-opening process of the formed cis-7-azanorbornane. Furthermore, trans-azanorbornane is 7.4 kcal/mol more stable than cis-azanorbornane. Our calculations provide a new explanation of the addition of dimethyl fumarate with 2,5-dimethylpyrrole exclusively giving trans-7-azanorbornane.
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Affiliation(s)
- Mian Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Hao Luo
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Min Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Jianyi Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
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10
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Nouri A, Zahedi E, Jafari FJ, Nouri A. Diels–Alder Reactions of α-Cyano α,β-Unsaturated Ketones with 2-Methyl-1,3-Butadiene: DFT Study of Mechanism, Reactivity and Regioselectivity. PROGRESS IN REACTION KINETICS AND MECHANISM 2015. [DOI: 10.3184/146867815x14262620270642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The mechanism, reactivity and regioselectivity of Diels–Alder cycloaddition reactions of 2-methyl-1,3-butadiene with four dienophiles, ( E)-2-benzylidene-3-oxobutanenitrile, ( E)-2-(furan-2-ylmethylene)-3-oxopentanenitrile, ( E)-2-benzylidene-4,4-dimethyl-3-oxopentanenitrile, and (E)-2-benzoyl-3-(furan-2-yl) acrylonitrile, have been studied by means of several theoretical approaches. The regioselectivity of these reactions has been confirmed by their activation energies, the Gazquez–Mendez rule, Houk's rule and global descriptors of the products. All the studied reactions have normal electron demand character and a polar nature. All calculations were done at the DFT-B3LYP/6-31G(d) level of theory.
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Affiliation(s)
- Azita Nouri
- Department of Chemistry, Shahr-e Qods Branch, Islamic Azad University, Tehran, Iran
| | - Ehsan Zahedi
- Department of Chemistry, Shahrood Branch, Islamic Azad University, Shahrood, Iran
| | | | - Arezu Nouri
- Central Laboratory, Iran Polymer and Petrochemical Institute, Tehran, Iran
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11
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Yahia W, Nacereddine AK, Liacha M. Towards Understanding the Role of Lewis Acid on the Regioselectivity and Mechanism for the Acetylation Reaction of 2-benzoxazolinone with Acetyl Chloride: A DFT Study. PROGRESS IN REACTION KINETICS AND MECHANISM 2014. [DOI: 10.3184/146867814x14119972226920] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A theoretical study of the role of the Lewis acid on the regioselectivity in the acylation reaction of 2-benzoxazolinone with acetyl chloride has been carried out through DFT calculations at the B3LYP/6-31G** level of theory. FMO analysis and DFT-based reactivity indices predicted favourable of the 6-regioisomer product. Analysis of the potential energy surfaces indicates that this acylation reaction proceeds with high 6-regioselectivity due to the favourable interactions in this pathway. The results obtained corroborate very well with the experimental data.
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Affiliation(s)
- Wassila Yahia
- Laboratoire de Synthèse et Biocatalyse Organique, Département de Chimie, Faculté des Sciences, Université Badji-Mokhtar Annaba, BP 12, 23000 Annaba, Algeria
- Département des Sciences de la Matière, Faculté des Sciences, Université du 20 Aout 1955 Skikda, BP 26 Skikda, Algeria
| | - Abdelmalek Khorief Nacereddine
- Laboratoire de Synthèse et Biocatalyse Organique, Département de Chimie, Faculté des Sciences, Université Badji-Mokhtar Annaba, BP 12, 23000 Annaba, Algeria
- Département de Physique et chimie, Ecole Normale Supérieure d'Enseignement Technologique de Skikda, Azzaba, Skikda, Algeria
| | - Messaoud Liacha
- Laboratoire de Synthèse et Biocatalyse Organique, Département de Chimie, Faculté des Sciences, Université Badji-Mokhtar Annaba, BP 12, 23000 Annaba, Algeria
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12
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Sarotti AM. Unraveling polar Diels–Alder reactions with conceptual DFT analysis and the distortion/interaction model. Org Biomol Chem 2014; 12:187-99. [DOI: 10.1039/c3ob41628c] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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13
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Vektariene A. Insights into the Mechanism of the Benzoannelated Thieno[3,2-b]furan Halogenation. Importance of HOMO–HOMO Interaction. J Phys Chem A 2013; 117:8449-58. [DOI: 10.1021/jp402257u] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ausra Vektariene
- Institute of Theoretical Physics
and Astronomy, Vilnius University, A. Gostauto
12, LT-01108 Vilnius,
Lithuania
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14
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A theoretical study of the mechanism, stereoselectivity and Lewis acid catalyst on the Diels–Alder cycloaddition between furan and activated alkenes. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.079] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Sakata K, Fujimoto H. Quantum chemical study of Diels-Alder reactions catalyzed by Lewis acid activated oxazaborolidines. J Org Chem 2013; 78:3095-103. [PMID: 23373629 DOI: 10.1021/jo400066h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The catalytic activity of Lewis acid activated oxazaborolidines in the Diels-Alder reaction between cyclopentadiene and methacrolein is investigated by using the DFT method. Oxazaborolidine is not able to coordinate to methacrolein in the absence of AlBr3 because the bonding stabilization is too small to cover the destabilization arising from the deformation of the two species. Accordingly, oxazaborolidine hardly catalyzes the cycloaddition by itself. The calculations show that the attachment of AlBr3 to the nitrogen atom of oxazaborolidine enhances the Lewis acidity of its boron center and enables it to coordinate to methacrolein. When the AlBr3-assisted oxazaborolidine is once coordinated, the catalytic activity originates mainly from the oxazaborolidine framework, and to a smaller extent from the attached AlBr3 part. The Lewis acid AlBr3 plays an additional role to facilitate the reaction by reducing the overlap repulsion between the diene and the dienophile. The attachment of AlBr3 to the oxygen atom, another Lewis basic site in oxazaborolidine, also gives a stable AlBr3-oxazaborolidine complex, but the reaction catalyzed by this complex is not preferred to that catalyzed by the complex in which AlBr3 is attached to the nitrogen atom. The electrophilicity of boron center in oxazaborolidine and those in the AlBr3-oxazaborolidine complexes are compared in terms of localized reactive orbitals.
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Affiliation(s)
- Ken Sakata
- Faculty of Pharmaceutical Sciences, Hoshi University, Ebara, Shinagawa-ku, Tokyo 142-8501, Japan.
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16
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Diels–Alder reactions for the rational design of benzo[b]thiophenes: DFT-based guidelines for synthetic chemists. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2011.11.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Affiliation(s)
- Pratim Kumar Chattaraj
- Department of Chemistry, Center for Theoretical Studies, Indian Institute of Technology, Kharagpur, India
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18
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Deuri S, Phukan P. Catalytic effect of molecular iodine in Diels–Alder reaction: a density functional theory study. Struct Chem 2011. [DOI: 10.1007/s11224-011-9803-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Brasca R, Kneeteman MN, Mancini PME, Fabian WMF. Comprehensive DFT Study on Site-, Regio-, and Stereoselectivity of Diels-Alder Reactions Leading to 5-Hydroxybenzofurans. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001196] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Abstract
The concept of net electrophilicity (electroaccepting power relative to electrodonating power) is introduced. It provides expected trends in most cases. A net electrophilicity scale is presented. Various reactivity descriptors for 32 molecules are calculated at the B3LYP/6-311+G(d) level of theory. Profiles of net electrophilicity along the reaction paths of thermoneutral, exothermic, endothermic, and cycloaddition reactions are analyzed. Net electrophilicity often attains its minimum value for a stable state or a favorable reaction.
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Affiliation(s)
- Pratim Kumar Chattaraj
- Department of Chemistry & Center for Theoretical Studies, Indian Institute of Technology, Kharagpur 721302, India.
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22
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Brasca R, Kneeteman MN, Mancini PM, Fabian WM. Theoretical explanation of the regioselectivity of polar cycloaddition reactions between furan derivatives and Danishefsky’s diene. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.07.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Domingo LR, Sáez JA. Understanding the mechanism of polar Diels-Alder reactions. Org Biomol Chem 2009; 7:3576-83. [PMID: 19675915 DOI: 10.1039/b909611f] [Citation(s) in RCA: 366] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A good correlation between the activation energy and the polar character of Diels-Alder reactions measured as the charge transfer at the transition state structure has been found. This electronic parameter controls the reaction rate to an even greater extent than other recognized structural features. The proposed polar mechanism, which is characterized by the electrophilic/nucleophilic interactions at the transition state structure, can be easily predicted by analyzing the electrophilicity/nucleophilicity indices defined within the conceptual density functional theory. Due to the significance of the polarity of the reaction, Diels-Alder reactions should be classified as non-polar (N), polar (P), and ionic (I).
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Affiliation(s)
- Luis R Domingo
- Departamento de Química Orgánica, Universidad de Valencia, Dr. Moliner 50, E-46100, Burjassot, Valencia, Spain.
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Nunzi F, Sgamellotti A, De Angelis F. Cr(CO)3-Activated Diels-Alder Reaction on Single-Wall Carbon Nanotubes: A DFT Investigation. Chemistry 2009; 15:4182-9. [DOI: 10.1002/chem.200802440] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Paddon-Row MN, Anderson CD, Houk KN. Computational evaluation of enantioselective Diels-Alder reactions mediated by Corey's cationic oxazaborolidine catalysts. J Org Chem 2009; 74:861-8. [PMID: 19067584 PMCID: PMC2631179 DOI: 10.1021/jo802323p] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The cationic oxazaborolidine-catalyzed Diels-Alder reactions of butadiene and a series of five dienophiles have been studied using density functional theory (B3LYP/6-31G(d)). In each case, the computational results successfully reproduce the experimentally observed sense of stereoinduction and enantiomeric ratio. The computed structures of the lowest energy Lewis acid-carbonyl complexes and Lewis acid-transition state complexes are closely related to the models for stereoselection proposed by Corey and co-workers.
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Sousa CA, Vale MLC, Rodríguez-Borges JE, Garcia-Mera X, Rodríguez-Otero J. Acid-catalyzed aza-Diels–Alder versus 1,3-dipolar cycloadditions of methyl glyoxylate oxime with cyclopentadiene. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.07.110] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Benchouk W, Mekelleche S. Theoretical study of the mechanism and regioselectivity of the 1,3-dipolar cycloaddition of diazomethane with methyl acrylate using theoretical approaches. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.theochem.2008.04.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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28
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Tóth F, Oláh J, Kalaus G, Greiner I, Szőllősy Á, Gömöry Á, Hazai L, Szántay C. Synthesis of vinca alkaloids and related compounds. Part 110: A new synthetic method for the preparation of pandoline-type alkaloid-like molecules. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.06.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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29
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Stecko S, Paśniczek K, Michel C, Milet A, Pérez S, Chmielewski M. A DFT study of 1,3-dipolar cycloaddition reactions of 5-membered cyclic nitrones with α,β-unsaturated lactones and with cyclic vinyl ethers: Part 1. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.07.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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30
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A novel application of the Diels–Alder reaction: nitronaphthalenes as normal electron demand dienophiles. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.02.054] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Ess D, Jones G, Houk K. Conceptual, Qualitative, and Quantitative Theories of 1,3-Dipolar and Diels–Alder Cycloadditions Used in Synthesis. Adv Synth Catal 2006. [DOI: 10.1002/adsc.200600431] [Citation(s) in RCA: 255] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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