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Dutka V, Kovalskyi Y, Aksimentyeva O, Tkachyk N, Oshchapovska N, Halechko H. Molecular Modelling of Acridine Oxidation by Peroxyacids. CHEMISTRY & CHEMICAL TECHNOLOGY 2019. [DOI: 10.23939/chcht13.03.334] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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2
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Afshari T, Mohsennia M. A molecular electron density theory study of Diels‐Alder reaction between Danishefsky's diene and (2E)‐3‐phenyl‐2‐(trifluoromethyl) acrylonitrile. J PHYS ORG CHEM 2019. [DOI: 10.1002/poc.3937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Tooba Afshari
- Department of ChemistryUniversity of Kashan Kashan Iran
| | - Mohsen Mohsennia
- Department of ChemistryUniversity of Kashan Kashan Iran
- Institute of Nanoscience and NanotechnologyUniversity of Kashan Kashan Iran
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Chiacchio MA, Legnani L, Caramella P, Tejero T, Merino P. Pivotal Neighboring-Group Participation in Substitution versus Elimination Reactions - Computational Evidence for Ion Pairs in the Thionation of Alcohols with Lawesson's Reagent. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700127] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Maria A. Chiacchio
- Dipartimento di Chimica; Università di Pavia; Via Taramelli 12 27100 Pavia Italy
- Dipartimento di Scienze del Farmaco; Università di Catania; V.le A. Doria 6 95125 Catania Italy
| | - Laura Legnani
- Dipartimento di Chimica; Università di Pavia; Via Taramelli 12 27100 Pavia Italy
| | - Pierluigi Caramella
- Dipartimento di Chimica; Università di Pavia; Via Taramelli 12 27100 Pavia Italy
| | - Tomas Tejero
- Instituto de Biocomputación y Física de Sistemas Complejos (BIFI); Universidad de Zaragoza; 50009 Zaragoza Spain
| | - Pedro Merino
- Instituto de Biocomputación y Física de Sistemas Complejos (BIFI); Universidad de Zaragoza; 50009 Zaragoza Spain
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4
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Jasiński R, Kula K, Kącka A, Mirosław B. Unexpected course of reaction between ( E)-2-aryl-1-cyano-1-nitroethenes and diazafluorene: why is there no 1,3-dipolar cycloaddition? MONATSHEFTE FUR CHEMIE 2017; 148:909-915. [PMID: 28458402 PMCID: PMC5387018 DOI: 10.1007/s00706-016-1893-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 12/10/2016] [Indexed: 12/02/2022]
Abstract
ABSTRACT Reactions between (E)-2-aryl-1-cyano-1-nitroethenes and diazafluorene lead to acyclic 2,3-diazabuta-1,3-diene derivatives, instead of the expected pyrazoline systems. DFT calculations suggest that this is a consequence of formation of zwitterionic structure in the first stage of the reaction. It must be noted that this is a specific property of the (E)-2-aryl-1-cyano-1-nitroethenes group, in contrast to most other conjugated nitroalkenes. GRAPHICAL ABSTRACT
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Affiliation(s)
- Radomir Jasiński
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
| | - Karolina Kula
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
| | - Agnieszka Kącka
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
| | - Barbara Mirosław
- Department of Crystallography, Maria Curie-Skłodowska University, Maria Curie-Skłodowska 3, 20-031 Lublin, Poland
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Díaz MA, Parra JG, Coll DS. Computational study of one-step polar Diels–Alder reactions using the NEB method for the minimum energy paths search. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1287910] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Miguel A. Díaz
- Laboratorio de Química Computacional, Departamento de Química, Universidad de Carabobo, Bárbula, Venezuela
| | - José G. Parra
- Laboratorio de Química Computacional, Departamento de Química, Universidad de Carabobo, Bárbula, Venezuela
| | - David S. Coll
- Laboratorio de Físico-Química Teórica de Materiales, Centro de Química Instituto Venezolano de Investigaciones Científicas, Altos de Pipe, Venezuela
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Merino P, Tejero T, Delso I, Matute R. New mechanistic interpretations for nitrone reactivity. Org Biomol Chem 2017; 15:3364-3375. [DOI: 10.1039/c7ob00429j] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of nitrones in cycloadditions and related reactions is revisited by introducing a topological perspective.
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Affiliation(s)
- Pedro Merino
- Instituto de Biocomputación y Fisica de Sistemas Complejos (BIFI)
- Universidad de Zaragoza
- 50009 Zaragoza
- Spain
| | - Tomás Tejero
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza
- CSIC
- 50009 Zaragoza
- Spain
| | - Ignacio Delso
- Servicio de Resonancia Magnética Nuclear
- CEQMA
- Universidad de Zaragoza
- CSIC
- 50009 Zaragoza
| | - Rosa Matute
- Departamento de Ingeniería Química y Tecnologías del Medio Ambiente
- EINA
- Edificio Torres Quevedo
- 50014 Zaragoza
- Spain
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A DFT computational study of the molecular mechanism of [3 + 2] cycloaddition reactions between nitroethene and benzonitrile N-oxides. J Mol Model 2016; 23:13. [PMID: 28032222 PMCID: PMC5196010 DOI: 10.1007/s00894-016-3185-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Accepted: 12/06/2016] [Indexed: 11/25/2022]
Abstract
DFT calculations were performed to shed light on the molecular mechanism of [3 + 2] cycloadditions of simple conjugated nitroalkenes to benzonitrile N-oxides. In particular, it was found that these processes proceed by a one-step mechanism through asynchronous transition states. According to the latest terminology, they should be considered polar but not stepwise processes.
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Jasiński R. First example of stepwise, zwitterionic mechanism for bicyclo[2.2.1]hept-5-ene (norbornene) formation process catalyzed by the 1-butyl-3-methylimidazolium cations. MONATSHEFTE FUR CHEMIE 2016; 147:1207-1213. [PMID: 27358502 PMCID: PMC4899506 DOI: 10.1007/s00706-016-1735-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/09/2016] [Indexed: 11/25/2022]
Abstract
Abstract B3LYP/6-31++G(d) calculations indicated that the reaction of (2E)-3-phenyl-2-nitroprop-2-enenitrile with cyclopentadiene catalyzed by cations of 1,3-dialkylimidazolium ionic liquid shall not take place according to the classical scheme of one-step [2+4] Diels–Alder cycloaddition. Along the path finally leading to bicyclo[2.2.1]hept-5-ene (norbornene) with a nitro group in endo orientation, the process of bicarbocyclic skeleton formation shall take place according to the domino mechanism, via [2+4] heterocycloadduct. On the other hand, along the path leading finally to bicyclo[2.2.1]hept-5-ene with a nitro group in exo orientation, acyclic adduct with a zwitterionic nature is formed in the first reaction, which undergoes cyclisation next in the second step of the reaction. Graphical abstract ![]()
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Affiliation(s)
- Radomir Jasiński
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Cracow, Poland
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Baichurin RI, Aboskalova NI, Trukhin EV, Berestovitskaya VM. Aryl(hetaryl)-containing gem-cyanonitroethenes: Synthesis, structure, and reactions with 2,3-dimethyl-1,3-butadiene. RUSS J GEN CHEM+ 2015. [DOI: 10.1134/s1070363215080101] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kinetics of Diels–Alder reactions between 1,3-cyclopentadiene and isoprene. REACTION KINETICS MECHANISMS AND CATALYSIS 2015. [DOI: 10.1007/s11144-015-0913-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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An experimental and theoretical study of the hetero Diels–Alder reactions between (E)-2-aryl-1-cyano-1-nitroethenes and ethyl vinyl ether: one-step or zwitterionic, two-step mechanism? REACTION KINETICS MECHANISMS AND CATALYSIS 2014. [DOI: 10.1007/s11144-014-0753-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Guo C, Wang H, Chen BZ, Tian Z. A computational investigation into the substituent effect on the chemo- and stereoselectivity of crossed intermolecular radical anion [2 + 2] cycloadditions of enones. RSC Adv 2014. [DOI: 10.1039/c4ra13816c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The chemoselectivity of cycloaddition is caused by the bulky group on the C atoms which form σ bond in the first step. The stereoselectivity mainly caused by the difference in steric interaction between the trans and cis transition states.
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Affiliation(s)
- Chenchen Guo
- School of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049, P. R. China
| | - Huiqun Wang
- School of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049, P. R. China
| | - Bo-Zhen Chen
- School of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049, P. R. China
| | - Zhiyuan Tian
- School of Chemistry and Chemical Engineering
- University of Chinese Academy of Sciences
- Beijing 100049, P. R. China
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Jasiński R, Kwiatkowska M, Sharnin V, Barański A. Experimental and theoretical studies of Diels-Alder reaction between methyl ( Z)-2-nitro-3-(4-nitrophenyl)-2-propenoate and cyclopentadiene. MONATSHEFTE FUR CHEMIE 2013; 144:327-335. [PMID: 26166878 PMCID: PMC4495048 DOI: 10.1007/s00706-012-0885-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 11/21/2012] [Indexed: 11/18/2022]
Abstract
Abstract The Diels–Alder reaction between methyl (Z)-2-nitro-3-(4-nitrophenyl)-2-propenoate and cyclopentadiene yields a mixture of carbodiene Diels–Alder adducts. B3LYP/6–31G(d) simulations indicate that the conversion of addends into methyl (1R*,2S*,3S*,4R*)-2-nitro-3-(4-nitrophenyl)-bicyclo[2.2.1]hept-5-ene-2-carboxylate occurs via two-stage heterodiene Diels–Alder reaction and (in a second step) skeleton rearrangement of the primary cycloadduct, whereas the reaction leading to methyl (1R*,2R*,3R*,4R*)-2-nitro-3-(4-nitrophenyl)-bicyclo[2.2.1]hept-5-ene-2-carboxylate is a single-step process. Graphical abstract ![]()
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Affiliation(s)
- Radomir Jasiński
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
| | - Magdalena Kwiatkowska
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
| | - Valentin Sharnin
- Department of Inorganic Chemistry, University of Chemistry and Technology, F. Engels 7, 153000 Ivanovo, Russia
| | - Andrzej Barański
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
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Jasiński R, Kwiatkowska M, Barański A. Kinetics of the [4+2] cycloaddition of cyclopentadiene with ( E)-2-aryl-1-cyano-1-nitroethenes. MONATSHEFTE FUR CHEMIE 2012; 143:895-899. [PMID: 26166865 PMCID: PMC4495029 DOI: 10.1007/s00706-012-0735-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Accepted: 02/09/2012] [Indexed: 11/17/2022]
Abstract
ABSTRACT The electrophilicity of (E)-2-aryl-1-cyano-1-nitroethenes is not sufficient to induce a zwitterionic course of their [4+2] cycloaddition to cyclopentadiene. The one-step mechanism of these reactions is indicated by the activation parameters, and the substituent and solvent effects on the reaction. GRAPHICAL ABSTRACT
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Affiliation(s)
- Radomir Jasiński
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
| | - Magdalena Kwiatkowska
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
| | - Andrzej Barański
- Institute of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
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A B3LYP/6-31G(d) study of Diels-Alder reactions between cyclopentadiene and (E)-2-arylnitroethenes. OPEN CHEM 2011. [DOI: 10.2478/s11532-011-0088-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractThe B3LYP/6-31G(d) simulations of competing CDA and HDA reactions between cyclopentadiene and (E)-2-arylnitroethenes prove that regardless of the medium polarity, the processes leading to respective 5-nitro-6-aryl-bicyclo-[2,2,0]-hept-2-enes 3,4 (paths A and B) should be most favoured, and the more electrophilic (E)-2-(p-nitrophenyl)-nitroethene should be more reactive than the less electrophilic (E)-2-(p-methoxyphenyl)-nitroethene. Asymmetry of the transition complexes on the favoured pathways increases with increase of medium polarity, but not sufficiently to enforce the zwitterionic mechanism. Analysis of competing pathways leading to HDA adducts proves that not all these compounds can be formed directly from the adducts. In particular, on the path C, the initially formed 5-nitro-6-aryl-bicyclo-[2,2,0]-hept-2-enes 3 is converted to 2-phenyl-4-aza-5-oxy-bicyclo-[3,4,0]-nona-3,7-diene N-oxides 5 as a result of a [3.3]-sigmatropic shift. On the paths D–F leading to 2-phenyl-4-aza-5-oxy-bicyclo-[3,4,0]-nonadienes N-oxides 6–8, the reaction proceeds according to a one-step mechanism.
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Jasiński R, Koifman OI, Barański A. A DFT study on the regioselectivity and molecular mechanism of nitroethene [2 + 3] cycloaddition to (Z)-C,N-diphenylnitrone and C,C,N-triphenylnitrone. MENDELEEV COMMUNICATIONS 2011. [DOI: 10.1016/j.mencom.2011.09.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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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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Jasiński R, Kwiatkowska M, Barański A. Stereoselectivity and kinetics of [4 + 2] cycloaddition reaction of cyclopentadiene to para-substituted E-2-arylnitroethenes. J PHYS ORG CHEM 2011. [DOI: 10.1002/poc.1853] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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