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Fındık V, Ruiz-López MF, Erdem SS. Mechanistic insights into lysine-targeting covalent inhibition through a theoretical study of ester aminolysis. Org Biomol Chem 2021; 19:9996-10004. [PMID: 34755747 DOI: 10.1039/d1ob01963e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Development of targeted covalent inhibitors in drug design has a broad and important interest and many efforts are currently being made in this direction. Targeted covalent inhibitors have special relevance in oncology due to the possibilities they offer to overcome the problems of acquired resistance. In recent experiments, lysine-targeting has been envisaged for the irreversible inhibition of the heterodimeric lipid kinase phosphoinositide 3-kinase delta (PI3Kδ). Activated esters have been evaluated and shown to be promising inhibitors of this enzyme, but the reaction mechanisms display specificities that are not yet fully understood. In the present work, we have carried out a theoretical study of the aminolysis reaction of model esters in aqueous solution to gain insights into the corresponding biological processes. We have found that phenolic esters bearing electron-withdrawing groups are particularly reactive. The predicted mechanism involves the formation of a tetrahedral zwitterionic intermediate, which dissociates into an alkoxide and a protonated amide, this charge separation being the driving force for the subsequent proton transfer and final product formation. Structure-reactivity relationships are reported and shown to be a useful tool for evaluating potential inhibitor candidates.
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Affiliation(s)
- Volkan Fındık
- LPCT, UMR 7019, University of Lorraine, CNRS, BP 70239, 54506 Vandoeuvre-les-Nancy, France. .,Department of Chemistry, Faculty of Arts and Sciences, Marmara University, 34722 Istanbul, Turkey.
| | - Manuel F Ruiz-López
- LPCT, UMR 7019, University of Lorraine, CNRS, BP 70239, 54506 Vandoeuvre-les-Nancy, France.
| | - Safiye Sag Erdem
- Department of Chemistry, Faculty of Arts and Sciences, Marmara University, 34722 Istanbul, Turkey.
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2
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Pattarawarapan M, Wiriya N, Yimklan S, Wangngae S, Phakhodee W. Zwitterionic Ring-Opened Oxyphosphonium Species from the Ph 3P-I 2 Mediated Reactions of Benzo[ d]oxazol-2(3 H)-ones with Secondary Amines. J Org Chem 2020; 85:6151-6158. [PMID: 32242407 DOI: 10.1021/acs.joc.0c00211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Instead of the expected substituted 2-aminobenzo[d]oxazoles, relatively stable ring-opened oxyphosphonium betaines were isolated for the first time from the Ph3P-I2-mediated reactions of benzo[d]oxazol-2(3H)-ones with acyclic secondary amines. The structure of one of these compounds was unambiguously confirmed by single-crystal X-ray analysis. Thermolysis of the betaines gave rise to 2-dialkylaminobenzoxazoles with concomitant loss of triphenylphosphine oxide, suggesting their possible role as intermediates in an alternative reaction path.
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Affiliation(s)
- Mookda Pattarawarapan
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Nittaya Wiriya
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Saranphong Yimklan
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Sirilak Wangngae
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Wong Phakhodee
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.,Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
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3
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Montecinos R, Gazitúa M, Santos JG. The effect of the electrophilic group on the hierarchy of nucleofuges in the aminolysis reactions of thiol- and dithiocarbonates with secondary alicyclic amines: A kinetic and theoretical study. NEW J CHEM 2019. [DOI: 10.1039/c9nj00385a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thiol- and dithiocarbonates react with amines, forming tetrahedral intermediates and then different product ratios. Theoretical results show that the product ratio depends on the water microsolvation of the electrophilic group in the anionic intermediate.
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Affiliation(s)
- Rodrigo Montecinos
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Marcela Gazitúa
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - José G. Santos
- Facultad de Química y de Farmacia
- Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
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4
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Zhang L, Meng Q, Chi Y, Zhang P. Toward High-Level Theoretical Studies of Large Biodiesel Molecules: An ONIOM [QCISD(T)/CBS:DFT] Study of the Reactions between Unsaturated Methyl Esters (CnH2n–1COOCH3) and Hydrogen Radical. J Phys Chem A 2018; 122:4882-4893. [DOI: 10.1021/acs.jpca.8b02327] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lidong Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China
| | - Qinghui Meng
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Yicheng Chi
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Peng Zhang
- Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
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5
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Zabalov MV, Tiger RP. Specificities of application of the supermolecule method to the calculation of reaction mechanisms in a protonodonor medium. Ethylene carbonate aminolysis in methanol. Theor Chem Acc 2017. [DOI: 10.1007/s00214-017-2124-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Montecinos R, Aliaga ME, Pavez P, Santos JG. Experimental and theoretical studies on the nucleofugality ratio in the aminolysis reactions of O-(4-cyanophenyl) O-(3-nitrophenyl) thionocarbonate with amines in aqueous ethanol. NEW J CHEM 2017. [DOI: 10.1039/c7nj00045f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The title thionocarbonate reacts with amines to form 4-cyanophenol and 3-nitrophenol in a 1.5 : 1 ratio. Theoretical results show that the products ratio depends on the microsolvation of the water molecules.
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Affiliation(s)
- Rodrigo Montecinos
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Margarita E. Aliaga
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - Paulina Pavez
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
| | - José G. Santos
- Facultad de Química. Pontificia Universidad Católica de Chile
- Santiago 6094411
- Chile
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7
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Desmet GB, D'hooge DR, Sabbe MK, Reyniers MF, Marin GB. Computational Investigation of the Aminolysis of RAFT Macromolecules. J Org Chem 2016; 81:11626-11634. [PMID: 27809531 DOI: 10.1021/acs.joc.6b01844] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work presents a detailed computational study and kinetic analysis of the aminolysis of dithioates, dithiobenzoates, trithiocarbonates, xanthates, and thiocarbamates, which are frequently used as chain-transfer agents for reversible addition-fragmentation chain-transfer (RAFT) polymerization. Rate coefficients were obtained from ab initio calculations, taking into account a diffusional contribution according to the encounter pair model. A kinetic model was constructed and reveals a reaction mechanism of four elementary steps: (i) formation of a zwitterionic intermediate, (ii) formation of a complex intermediate in which an assisting amine molecule takes over the proton from the zwitterionic intermediate, (iii) breakdown of the complex into a neutral tetrahedral intermediate with release of the assisting amine molecule, and (iv) amine-assisted breakdown of the neutral intermediate to the products. Furthermore, a comparative analysis indicates that the alkanedithioates and dithiobenzoates react the fastest, followed, respectively, by xanthates and trithiocarbonates, which react almost equally fast, and dithiocarbamates, which are not reactive at typical experimentally used conditions.
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Affiliation(s)
- Gilles B Desmet
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Dagmar R D'hooge
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Maarten K Sabbe
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Marie-Françoise Reyniers
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
| | - Guy B Marin
- Laboratory for Chemical Technology and ‡Department of Textiles, Ghent University , Technologiepark 914, 9052 Gent, Belgium
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8
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Baker MB, Ferreira RB, Tasseroul J, Lampkins AJ, Al Abbas A, Abboud KA, Castellano RK. Selective and Sequential Aminolysis of Benzotrifuranone: Synergism of Electronic Effects and Ring Strain Gradient. J Org Chem 2016; 81:9279-9288. [DOI: 10.1021/acs.joc.6b01867] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Matthew B. Baker
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Renan B. Ferreira
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Jonathan Tasseroul
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Andrew J. Lampkins
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Alexandre Al Abbas
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Ronald K. Castellano
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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9
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Chen R, Luo X, Liang G. Computational study on the aminolysis mechanism of 4,4-dimethyl-2-vinyl-2-oxazolin-5-one with methylamine. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.09.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Efremenko I, Fish RH. Quantum Chemical and Molecular Docking Studies of [(η6-Cp*Rh-Tyr1)-Leu-enkephalin]2+ to G-Protein-Coupled μ-, ∂-, and κ-Opioid Receptors and Comparisons to the Neuropeptide [Tyr1]-Leu-enkephalin: Conformations, Noncovalent Amino Acid Binding Sites, Binding Energies, Electronic Factors, and Receptor Distortion Forces. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00542] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Irena Efremenko
- Department
of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Richard H. Fish
- Lawrence
Berkeley National Laboratory, University of California, Berkeley, California 94720, United States
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11
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Chen R, Luo X, Liang G. Theoretical studies on the aminolysis mechanism of propylene carbonate with ammonia. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1634-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Allen S, Hsieh SY, Gutierrez O, Bode JW, Kozlowski MC. Concerted amidation of activated esters: reaction path and origins of selectivity in the kinetic resolution of cyclic amines via N-heterocyclic carbenes and hydroxamic acid cocatalyzed acyl transfer. J Am Chem Soc 2014; 136:11783-91. [PMID: 25050843 PMCID: PMC4140451 DOI: 10.1021/ja505784w] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Indexed: 01/18/2023]
Abstract
The N-heterocyclic carbene and hydroxamic acid cocatalyzed kinetic resolution of cyclic amines generates enantioenriched amines and amides with selectivity factors up to 127. In this report, a quantum mechanical study of the reaction mechanism indicates that the selectivity-determining aminolysis step occurs via a novel concerted pathway in which the hydroxamic acid plays a key role in directing proton transfer from the incoming amine. This modality was found to be general in amide bond formation from a number of activated esters including those generated from HOBt and HOAt, reagents that are broadly used in peptide coupling. For the kinetic resolution, the proposed model accurately predicts the faster reacting enantiomer. A breakdown of the steric and electronic control elements shows that a gearing effect in the transition state is responsible for the observed selectivity.
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Affiliation(s)
- Scott
E. Allen
- Department
of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Sheng-Ying Hsieh
- Laboratorium
für Organische Chemie, ETH-Zürich, Zürich 8093, Switzerland
| | - Osvaldo Gutierrez
- Department
of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jeffrey W. Bode
- Laboratorium
für Organische Chemie, ETH-Zürich, Zürich 8093, Switzerland
| | - Marisa C. Kozlowski
- Department
of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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13
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Kim MY, Shin M, Um IH. Kinetic Study on Aminolysis of 4-Nitrophenyl Nicotinate and Isonicotinate: Factors Influencing Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.8.2443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Kim HR, Yoon JH, Kim MY, Um IH. Kinetic Study on Aminolysis of 2-Chloro-4-nitrophenyl X-Substituted-Benzoates in Acetonitrile and in H 2O Containing 20 mol % DMSO: Effects of Medium and Substituent X on Reactivity and Reaction Mechanism. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20140048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Ha-Ram Kim
- Department of Science Education, Ewha Womans University
| | | | | | - Ik-Hwan Um
- Department of Chemistry, Ewha Womans University
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15
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Shin M, Kim MY, Um IH. Kinetic Study on Aminolysis of 4-Nitrophenyl Isonicotinate in Acetonitrile: Effect of Amine Basicity on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.7.2130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Lee J, Kim MY, Um IH. Kinetic Study on Nucleophilic Substitution Reaction of 5-Nitro-8-quinolyl Benzoate, Picolinate, Nicotinate and Isonicotinate with Alkali Metal Ethoxide: Effect of Nonleaving Group on Reactivity and Transition State Structure. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.6.1789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Kim HR, Um TI, Kim MY, Um IH. Kinetic Study on Aminolysis of 4-Chloro-2-Nitrophenyl X-Substituted-Benzoates in Acetonitrile and in 80 mol % H2O/20 mol % DMSO: Effect of Medium on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.4.1128] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Jeon SH, Kim HS, Han YJ, Kim MY, Um IH. Kinetic Study on Aminolysis of Y-Substituted-Phenyl X-Substituted-Benzoates: Effects of Substituents X and Y on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.2.471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Um IH, Bae AR, Um TI. Comparison of aminolysis of 2-pyridyl and 4-pyridyl x-substituted benzoates in acetonitrile: evidence for a concerted mechanism involving a cyclic transition state. J Org Chem 2014; 79:1206-12. [PMID: 24397405 DOI: 10.1021/jo402629e] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A kinetic study on reactions of 2-pyridyl X-substituted benzoates (6a-i) with a series of cyclic secondary amines in MeCN is reported. The Hammett plot for the reaction of 6a-i with piperidine consists of two intersecting straight lines while the Yukawa-Tsuno plot exhibits an excellent linear correlation with ρX = 1.28 and r = 0.63, indicating that the nonlinear Hammett plot is not caused by a change in the rate-determining step but rather by resonance stabilization of substrates possessing an electron-donating group (EDG) in the benzoyl moiety. The Brønsted-type plots are linear with βnuc = 0.59 ± 0.02, which is typical of reactions reported to proceed through a concerted mechanism. A cyclic transition state (TS), which forces the reaction to proceed through a concerted mechanism, is proposed. The deuterium kinetic isotope effect of 1.3 ± 0.1 is consistent with the proposed mechanism. Analysis of activation parameters reveals that ΔH(‡) increases linearly as the substituent X changes from an electron-withdrawing group (EWG) to an EDG, while TΔS(‡) remains nearly constant with a large negative value. The constant TΔS(‡) value further supports the proposal that the reaction proceeds through a concerted mechanism with a cyclic TS.
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Affiliation(s)
- Ik-Hwan Um
- Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea
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Lee JY, Kim MY, Um IH. Kinetic Study on Nucleophilic Substitution Reactions of 4-Nitrophenyl X-Substituted-2-Methylbenzoates with Cyclic Secondary Amines in Acetonitrile: Reaction Mechanism and Failure of Reactivity-Selectivity Principle. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.1.93] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Lee JY, Kim MY, Um IH. Kinetic Study on Nucleophilic Displacement Reactions of Y-Substituted-Phenyl 2-Methylbenzoates with Cyclic Secondary Amines in Acetonitrile: Effects of Modification of 2-MeO in Benzoyl Moiety by 2-Me on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.12.3795] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Nathavad ZP, Bhatia S, Dhaked DK, Bharatam PV. Electronic structure analysis of isomeric preferences of canonical and zwitterionic forms of lornoxicam. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2013.09.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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23
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Son YJ, Kim EH, Kang JS, Um IH. Structure-Reactivity Correlations in Nucleophilic Displacement Reactions of Y-Substituted-Phenyl X-Substituted-Cinnamates with Z-Substituted-Phenoxides. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.8.2455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Kim MY, Bae AR, Um IH. A Kinetic Study on Aminolysis of Benzyl 2-Pyridyl Thionocarbonate and t-Butyl 2-Pyridyl Thionocarbonate: Effects of Polarizability and Steric Hindrance on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.8.2325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Song YJ, Kim MY, Um IH. A Kinetic Study on Ethylaminolysis of Phenyl Y-Substituted-Phenyl Carbonates: Effect of Leaving-Group Substituents on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.6.1722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Świderek K, Tuñón I, Martí S, Moliner V, Bertrán J. Role of Solvent on Nonenzymatic Peptide Bond Formation Mechanisms and Kinetic Isotope Effects. J Am Chem Soc 2013; 135:8708-19. [DOI: 10.1021/ja403038t] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Katarzyna Świderek
- Institute of Applied Radiation
Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
- Departament de Química
Física, Universitat de València, 46100 Burjassot, Spain
| | - Iñaki Tuñón
- Departament de Química
Física, Universitat de València, 46100 Burjassot, Spain
| | - Sergio Martí
- Departament de Química
Física i Analítica, Universitat Jaume I, 12071 Castelló, Spain
| | - Vicent Moliner
- Departament de Química
Física i Analítica, Universitat Jaume I, 12071 Castelló, Spain
| | - Juan Bertrán
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra,
Spain
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27
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Um IH, Kang JS, Park JY. Kinetic Study on Michael-Type Reactions of β-Nitrostyrenes with Cyclic Secondary Amines in Acetonitrile: Transition-State Structures and Reaction Mechanism Deduced from Negative Enthalpy of Activation and Analyses of LFERs. J Org Chem 2013; 78:5604-10. [DOI: 10.1021/jo4007442] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Ik-Hwan Um
- Department
of Chemistry and Division of Nano Sciences and ‡Department of Science Education, Ewha Womans University, Seoul 120-750,
Korea
| | - Ji-Sun Kang
- Department
of Chemistry and Division of Nano Sciences and ‡Department of Science Education, Ewha Womans University, Seoul 120-750,
Korea
| | - Jong-Yoon Park
- Department
of Chemistry and Division of Nano Sciences and ‡Department of Science Education, Ewha Womans University, Seoul 120-750,
Korea
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28
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Kim MY, Lee JI, Um IH. Aminolysis of Benzyl 2-Pyridyl Thionocarbonate and t-Butyl 2-Pyridyl Thionocarbonate: Effects of Nonleaving Groups on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.4.1115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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Theoretical study on the aminolysis of p-substituted phenyl acetates with dimeric ammonia in vacuo and acetonitrile. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2012.12.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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Zhu Y, Li Y, Zhang W, Zhao Q, Tang M. DFT study on reaction mechanisms of propylamine and dimethyl acetylenedicarboxylate with 1,3-dimethylalloxan. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2012.10.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Min SW, Kim MY, Um IH. A Kinetic Study on Nucleophilic Substitution Reactions of Phenyl Y-Substituted-Phenyl Carbonates with Z-Substituted-Phenoxides: Effect of Modification of Nonleaving Group from Benzoyl to Phenyloxycarbonyl on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.10.3253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Mechanistic Assessment of SNAr Displacement of Halides from 1-Halo-2,4-dinitrobenzenes by Selected Primary and Secondary Amines: Brønsted and Mayr Analyses. J Org Chem 2012; 77:9738-46. [DOI: 10.1021/jo301862b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Bae AR, Um IH. Aminolysis of Benzyl 4-Pyridyl Carbonate in Acetonitrile: Effect of Modification of Leaving Group from 2-Pyridyloxide to 4-Pyridyloxide on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.8.2719] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sunoj RB, Anand M. Microsolvated transition state models for improved insight into chemical properties and reaction mechanisms. Phys Chem Chem Phys 2012; 14:12715-36. [PMID: 22893252 DOI: 10.1039/c2cp41719g] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Over the years, several methods have been developed to effectively represent the chemical behavior of solutes in solvents. The environmental effects arising due to solvation can generally be achieved either through inclusion of discrete solvent molecules or by inscribing into a cavity in a homogeneous and continuum dielectric medium. In both these approaches of computational origin, the perturbations on the solute induced by the surrounding solvent are at the focus of the problem. While the rigor and method of inclusion of solvent effects vary, such solvation models have found widespread applications, as evident from modern chemical literature. A hybrid method, commonly referred to as cluster-continuum model (CCM), brings together the key advantages of discrete and continuum models. In this perspective, we intend to highlight the latent potential of CCM toward obtaining accurate estimates on a number of properties as well as reactions of contemporary significance. The objective has generally been achieved by choosing illustrative examples from the literature, besides expending efforts to bring out the complementary advantages of CCM as compared to continuum or discrete solvation models. The majority of examples emanate from the prevalent applications of CCM to organic reactions, although a handful of interesting organometallic reactions have also been discussed. In addition, increasingly accurate computations of properties like pK(a) and solvation of ions obtained using the CCM protocol are also presented.
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Affiliation(s)
- Raghavan B Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
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Kang JS, Um IH. Kinetics and Reaction Mechanism for Aminolysis of Benzyl 4-Pyridyl Carbonate in H 2O: Effect of Modification of Nucleofuge from 2-Pyridyloxide to 4-Pyridyloxide on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.7.2269] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Um IH, Bae AR. Electronic Nature of Substituent X Governs Reaction Mechanism in Aminolysis of 4-Pyridyl X-Substituted-Benzoates in Acetonitrile. J Org Chem 2012; 77:5781-7. [DOI: 10.1021/jo300961y] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ik-Hwan Um
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
| | - Ae Ri Bae
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
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Bae AR, Um IH. Kinetics and Reaction Mechanism of Aminolyses of Benzyl 2-Pyridyl Carbonate and t-Butyl 2-Pyridyl Carbonate in Acetonitrile. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.5.1547] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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38
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Kang JS, Lee JI, Um IH. Kinetics and Reaction Mechanism of Aminolyses of Benzyl 2-Pyridyl Carbonate and t-Butyl 2-Pyridyl Carbonate: Effect of Nonleaving Group on Reactivity and Reaction Mechanism. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.5.1551] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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39
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Acosta-Silva C, Bertran J, Branchadell V, Oliva A. Quantum-Mechanical Study on the Mechanism of Peptide Bond Formation in the Ribosome. J Am Chem Soc 2012; 134:5817-31. [DOI: 10.1021/ja209558d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Carles Acosta-Silva
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Joan Bertran
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Vicenç Branchadell
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Antoni Oliva
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
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Role of bifunctional catalyst 2-pyridone in the aminolysis of p-nitrophenyl acetate with n-butylamine: A computational study. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2011.12.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Świderek K, Tuñón I, Martí S, Moliner V, Bertrán J. Do zwitterionic species exist in the non-enzymatic peptide bond formation? Chem Commun (Camb) 2012; 48:11253-5. [DOI: 10.1039/c2cc35409h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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42
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de Oliveira VM, Silva de Jesus R, Gomes AF, Gozzo FC, Umpierre AP, Suarez PAZ, Rubim JC, Neto BAD. Catalytic Aminolysis (Amide Formation) from Esters and Carboxylic Acids: Mechanism, Enhanced Ionic Liquid Effect, and its Origin. ChemCatChem 2011. [DOI: 10.1002/cctc.201100221] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Um IH, Bae AR. Aminolysis of Y-Substituted-phenyl 2-Methoxybenzoates in Acetonitrile: Effect of the o-Methoxy Group on Reactivity and Reaction Mechanism. J Org Chem 2011; 76:7510-5. [DOI: 10.1021/jo201387h] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ik-Hwan Um
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
| | - Ae Ri Bae
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
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Leung EKY, Suslov N, Tuttle N, Sengupta R, Piccirilli JA. The Mechanism of Peptidyl Transfer Catalysis by the Ribosome. Annu Rev Biochem 2011; 80:527-55. [DOI: 10.1146/annurev-biochem-082108-165150] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Nikolai Suslov
- Department of Biochemistry and Molecular Biology, Chicago, Illinois 60637
| | - Nicole Tuttle
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637;
| | - Raghuvir Sengupta
- Department of Biochemistry, Stanford University, Stanford, California 94305
| | - Joseph Anthony Piccirilli
- Department of Biochemistry and Molecular Biology, Chicago, Illinois 60637
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637;
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Sung DD, Lee I. Ethyl Anomaly in the Nucleophilic Substitution at a Series of β-Methylated Alkyl RCH 2Z and Carbonyl RCOZ Carbon Centers for R = Me, Et, i-Pr, t-Bu, and Z = LG. J Phys Chem A 2011; 115:3386-92. [DOI: 10.1021/jp201643d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dae Dong Sung
- Department of Chemistry, Dong-A University, Busan, 604-714 Korea
| | - Ikchoon Lee
- Department of Chemistry, Inha University, Inchon 402-751 Korea
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Son MJ, Kim SI, Um IH. Pyridinolysis of 2,4-Dinitrophenyl Phenyl Thionocarbonate: Effect of Changing Electrophilic Center from C=O to C=S on Reactivity and Mechanism. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.4.1165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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47
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Im LR, Jeon SE, Um IH. Aminolysis of S-4-Nitrophenyl X-Substituted Thiobenzoates: Effect of Nonleaving-Group Substituents on Reactivity and Mechanism. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.4.1153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Andrada DM, Jimenez-Halla JOC, Solà M. Mechanism of the aminolysis of Fischer alkoxy and thiocarbene complexes: a DFT study. J Org Chem 2010; 75:5821-36. [PMID: 20704176 DOI: 10.1021/jo100738x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
B3LYP calculations have been carried out to study the reaction mechanism of the aminolysis of Fischer carbene complexes of the type (CO)(5)Cr=C(XMe)R (X = O and S; R = Me and Ph). We have explored different possible reaction mechanisms either through neutral or zwitterionic intermediates as well as a general base catalysis assisted by an ammonia molecule. Our results show that the most favorable pathway for the aminolysis of Fischer carbene complexes is through a stepwise reaction via a zwitterionic intermediate generated by the initial nucleophilic attack. We have found that the ammonia-catalyzed mechanism entails a significantly lower barrier for the rate-determining step than the uncatalyzed one. At lower pressure gas-phase conditions, the rate-determining step corresponds to the concerted proton transfer and MeXH elimination. Thiocarbene complexes show a higher energy barrier for this rate-determining step due to the lower basicity of the MeS(-) substituent. At higher pressure or in solution, the rate-determining step corresponds to the initial nucleophilic attack. Our results indicate that the transition state of the nucleophilic attack is more advanced and has a higher barrier for alkoxycarbene than thiocarbene complexes due to the stronger pi-donor character of the alkoxy group that reduces the electrophilicity of the attacked carbene atom making the nucleophilic attack more difficult.
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Affiliation(s)
- Diego M Andrada
- Instituto de Investigaciones en Fisicoquímica de Córdoba, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5016 Córdoba, Argentina
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Um IH, Im LR, Buncel E. Pitfalls in assessing the α-effect: reactions of substituted phenyl methanesulfonates with HOO(-), OH(-), and substituted phenoxides in H(2)O. J Org Chem 2010; 75:8571-7. [PMID: 21086969 DOI: 10.1021/jo101978x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Toward resolving the current controversy regarding the validity of the α-effect, we have examined the reactions of Y-substituted phenyl methanesulfonates 1a-1l with HOO(-), OH(-), and Z-substituted phenoxides in the gas phase versus solution (H(2)O). Criteria examined in this work are the following: (1) Brønsted-type and Hammett plots for reactions with HOO(-)and OH(-), (2) comparison of β(lg) values reported previously for the reactions of Y-substituted phenyl benzenesulfonates 2a-2k with HOO(-) (β(lg) = -0.73) and OH(-) (β(lg) = -0.55), and for those of 1a-1l with HOO(-) (β(lg) = -0.69) and OH(-) (β(lg) = -1.35), and (3) Brønsted-type plot showing extreme deviation of OH(-) for reactions of 2,4-dintrophenyl methanesulfonate 1a with aryloxides, HOO(-), and OH(-), signifying extreme solvation vs different mechanisms. The results reveal significant pitfalls in assessing the validity of current interpretations of the α-effect. The extreme negative deviation by OH(-) must be due, in part, to the difference in their reaction mechanisms. Thus, the apparent dependence of the α-effect on leaving-group basicity found in this study has no significant meaning due to the difference in operating mechanisms. The current results argue in favor of a further criterion, i.e., a consistency in mechanism for the α-nucleophiles and normal nucleophiles.
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Affiliation(s)
- Ik-Hwan Um
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea.
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50
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Rangelov MA, Petrova GP, Yomtova VM, Vayssilov GN. Catalytic Role of Vicinal OH in Ester Aminolysis: Proton Shuttle versus Hydrogen Bond Stabilization. J Org Chem 2010; 75:6782-92. [DOI: 10.1021/jo100886p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Miroslav A. Rangelov
- Laboratory of BioCatalysis, Institute of Organic Chemistry, Bulgarian Academy of Sciences, Str. Acad. G. Bontchev, Bl. 9, 1113 Sofia, Bulgaria
| | - Galina P. Petrova
- Faculty of Chemistry, University of Sofia, Boulevard James Bouchier 1, 1164 Sofia, Bulgaria
| | - Vihra M. Yomtova
- Laboratory of BioCatalysis, Institute of Organic Chemistry, Bulgarian Academy of Sciences, Str. Acad. G. Bontchev, Bl. 9, 1113 Sofia, Bulgaria
| | - Georgi N. Vayssilov
- Faculty of Chemistry, University of Sofia, Boulevard James Bouchier 1, 1164 Sofia, Bulgaria
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