1
|
Vallejos González V, Podlech J. Oxidation of Dithia Compounds: Comparative Experimental and Theoretical Studies on 1,3‐Bis(methylthio)propane, Bis(methylthio)methane, and
meso
‐4,6‐Dimethyl‐1,3‐dithiane. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Victorino Vallejos González
- Institut für Organische Chemie Karlsruher Institut für Technologie (KIT) 76131 Karlsruhe Fritz-Haber-Weg 6 Germany
| | - Joachim Podlech
- Institut für Organische Chemie Karlsruher Institut für Technologie (KIT) 76131 Karlsruhe Fritz-Haber-Weg 6 Germany
| |
Collapse
|
2
|
Jung ST, Nickisch R, Reinsperger T, Luy B, Podlech J. Stereoelectronic effects: Perlin effects in cyclohexane‐derived compounds. J PHYS ORG CHEM 2020. [DOI: 10.1002/poc.4165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Sebastian T. Jung
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
| | - Roman Nickisch
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
| | - Tony Reinsperger
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
- Institute for Biological Interfaces 4—Magnetic Resonance Karlsruher Institute of Technology (KIT) Eggenstein‐Leopoldshafen Germany
| | - Burkhard Luy
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
- Institute for Biological Interfaces 4—Magnetic Resonance Karlsruher Institute of Technology (KIT) Eggenstein‐Leopoldshafen Germany
| | - Joachim Podlech
- Institute for Organic Chemistry Karlsruher Institute of Technology (KIT) Karlsruhe Germany
| |
Collapse
|
3
|
Jung ST, Podlech J. Development of a Robust Protocol for the Determination of Weak Acids’ p Ka Values in DMSO. J Org Chem 2020; 85:10951-10957. [DOI: 10.1021/acs.joc.0c00909] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sebastian T. Jung
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Joachim Podlech
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| |
Collapse
|
4
|
|
5
|
Martins FA, Pires FC, da Cunha EFF, Freitas MP. Does induced current density explain the C-H and C-F Perlin effects? Phys Chem Chem Phys 2019; 21:18622-18628. [PMID: 31414084 DOI: 10.1039/c9cp02558h] [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
Spin-spin coupling constant (SSCC) data may be useful in providing information on the stereochemistry and intramolecular interactions in molecules. One-bond C-H and C-F SSCCs (1JCH and 1JCF) are amongst the most important NMR parameters used to study the structure of alicyclic six-membered rings, because the Perlin effect, defined as 1JCHeq > 1JCHax, and the fluorine Perlin-like effect, defined as |1JCFeq| > |1JCFax|, are in wide currency to probe the conformations of these compounds. The origin of these effects has been usually attributed either to dipolar interactions or hyperconjugation, while the induced current density (ICD) has been recently correlated to the magnetic shielding tensors in some six-membered ring compounds, and then used to explain the Perlin effect. Accordingly, this work reports an analysis of the ICD as a descriptor of 1JCH and 1JCF in a series of six-membered rings to find out the role of the ICD in the conventional and fluorine Perlin effect. The atoms in molecules (AIM) magnetic responses obtained from density functional theory (DFT) calculations for the studied compounds did not show any relationship of the first-order electronic current density (ΔJ(1)) with the calculated Δ1JCHax-eq and Δ1JCFax-eq values. Consequently, the title effects cannot be precisely explained by ICD. Nevertheless, an interesting relationship between ΔJ(1) and Δdelocalization involving σCH* orbitals is observed.
Collapse
Affiliation(s)
- Francisco A Martins
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, MG, Brazil.
| | | | | | | |
Collapse
|
6
|
Jung S, Podlech J. Stereoelectronic Effects: The γ-Gauche Effect in Sulfoxides. J Phys Chem A 2018; 122:5764-5772. [DOI: 10.1021/acs.jpca.8b03729] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sebastian Jung
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Joachim Podlech
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| |
Collapse
|
7
|
|
8
|
Pisano L, Degennaro L, Carraro M, Azzena U, Fanelli F, Mastrorilli P, Luisi R. Computational NMR as Useful Tool for Predicting Structure and Stereochemistry of Four-Membered Sulfur Heterocycles. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600372] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Luisa Pisano
- Department of Chemistry and Pharmacy; University of Sassari; Via Vienna 2 07100 Sassari Italy
| | - Leonardo Degennaro
- Department of Pharmacy - Drug Sciences, University of Bari “A. Moro”; FLAME-Lab - Flow Chemistry and Microreactor Technology Laboratory; University of Bari; Via E. Orabona 4 70125 Bari Italy
| | - Massimo Carraro
- Department of Chemistry and Pharmacy; University of Sassari; Via Vienna 2 07100 Sassari Italy
| | - Ugo Azzena
- Department of Chemistry and Pharmacy; University of Sassari; Via Vienna 2 07100 Sassari Italy
| | - Flavio Fanelli
- Department of Pharmacy - Drug Sciences, University of Bari “A. Moro”; FLAME-Lab - Flow Chemistry and Microreactor Technology Laboratory; University of Bari; Via E. Orabona 4 70125 Bari Italy
- Institution: CNR, Institue of Crystallography IC-CNR; Via Amendola 127/A 70125 Bari Italy
| | | | - Renzo Luisi
- Department of Pharmacy - Drug Sciences, University of Bari “A. Moro”; FLAME-Lab - Flow Chemistry and Microreactor Technology Laboratory; University of Bari; Via E. Orabona 4 70125 Bari Italy
| |
Collapse
|
9
|
Berry E, Gomes GDP, MacLean A, Martin JR, Wiget PA. Discovery of a Long-Range Perlin Effect in a Conformationally Constrained Oxocane. J Org Chem 2016; 81:5740-4. [DOI: 10.1021/acs.joc.6b00819] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Gabriel dos Passos Gomes
- Department of Chemistry & Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | | | - Justin R. Martin
- Department
of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
| | | |
Collapse
|
10
|
Garcias-Morales C, Ortegón-Reyna D, Ariza-Castolo A. Investigation of the role of stereoelectronic effects in the conformation of piperidones by NMR spectroscopy and X-ray diffraction. Beilstein J Org Chem 2015; 11:1973-84. [PMID: 26664617 PMCID: PMC4660988 DOI: 10.3762/bjoc.11.213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/01/2015] [Indexed: 12/28/2022] Open
Abstract
This paper reports the synthesis of a series of piperidones 1-8 by the Mannich reaction and analysis of their structures and conformations in solution by NMR and mass spectrometry. The six-membered rings in 2,4,6,8-tetraphenyl-3,7-diazabicyclo[3.3.1]nonan-9-ones, compounds 1 and 2, adopt a chair-boat conformation, while those in 2,4-diphenyl-3-azabicyclo[3.3.1]nonan-9-ones, compounds 3-8, adopt a chair-chair conformation because of stereoelectronic effects. These stereoelectronic effects were analyzed by the (1) J C-H coupling constants, which were measured in the (13)C satellites of the (1)H NMR spectra obtained with the hetero-dqf pulse sequence. In the solid state, these stereoelectronic effects were investigated by measurement of X-ray diffraction data, the molecular geometry (torsional bond angles and bond distances), and inter- and intramolecular interactions, and by natural bond orbital analysis, which was performed using density functional theory at the ωB97XD/6311++G(d,p) level. We found that one of the main factors influencing the conformational stability of 3-8 is the interaction between the lone-pair electrons of nitrogen and the antibonding sigma orbital of C(7)-Heq (nN→σ*C-H(7)eq), a type of hyperconjugative interaction.
Collapse
Affiliation(s)
- Cesar Garcias-Morales
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2508 Colonia San Pedro Zacatenco, C.P. 07360, México, D.F., Mexico
| | - David Ortegón-Reyna
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2508 Colonia San Pedro Zacatenco, C.P. 07360, México, D.F., Mexico
| | - Armando Ariza-Castolo
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Avenida Instituto Politécnico Nacional 2508 Colonia San Pedro Zacatenco, C.P. 07360, México, D.F., Mexico
| |
Collapse
|
11
|
Süveges BD, Podlech J. Stereoelectronic effects in conformations of sulfide, sulfoxide, and sulfone α-carbanions. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.10.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
12
|
Ormazabal-Toledo R, Santos JG, Ríos P, Castro EA, Campodónico PR, Contreras R. Hydrogen Bond Contribution to Preferential Solvation in SNAr Reactions. J Phys Chem B 2013; 117:5908-15. [DOI: 10.1021/jp4005295] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rodrigo Ormazabal-Toledo
- Departamento de Química,
Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
| | - José G. Santos
- Facultad de Química, Pontificia Universidad Católica de Chile, Casilla
306, Santiago 6094411, Chile
| | - Paulina Ríos
- Facultad de Química, Pontificia Universidad Católica de Chile, Casilla
306, Santiago 6094411, Chile
| | - Enrique A. Castro
- Facultad de Química, Pontificia Universidad Católica de Chile, Casilla
306, Santiago 6094411, Chile
| | - Paola R. Campodónico
- Instituto de Ciencias, Facultad
de Medicina, Clínica Alemana Universidad del Desarrollo, Santiago 7710162, Chile
| | - Renato Contreras
- Departamento de Química,
Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
| |
Collapse
|
13
|
Ulshöfer R, Wedel T, Süveges B, Podlech J. Conformationally Constrained Oxides of 1,3-Dithiane: Synthesis and NMR Spectroscopic Investigations. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200675] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
14
|
Podlech J. Stereoelectronic Effects in α-Carbanions of Conformationally Constrained Sulfides, Sulfoxides, and Sulfones. J Phys Chem A 2010; 114:8480-7. [DOI: 10.1021/jp1063758] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joachim Podlech
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| |
Collapse
|
15
|
Affiliation(s)
- Roland Ulshöfer
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Joachim Podlech
- Institut für Organische Chemie, Karlsruher Institut für Technologie (KIT), Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| |
Collapse
|
16
|
Gauze GF, Basso EA, Contreras RH, Tormena CF. Effect of Sulfur Oxidation on the Transmission Mechanism of 4JHH NMR Coupling Constants in 1,3-Dithiane. J Phys Chem A 2009; 113:2647-51. [DOI: 10.1021/jp810981z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gisele F. Gauze
- Departamento de Química, Universidade Estadual de Maringá, CEP-87020-900, Maringá, PR, Brazil, Department of Physics, FCEyN, University of Buenos Aires and CONICET, Buenos Aires, Argentina, and Department of Organic Chemistry, Chemistry Institute, P.O. Box 6154, University of Campinas, UNICAMP, CEP: 13084-971 Campinas, SP, Brazil
| | - Ernani A. Basso
- Departamento de Química, Universidade Estadual de Maringá, CEP-87020-900, Maringá, PR, Brazil, Department of Physics, FCEyN, University of Buenos Aires and CONICET, Buenos Aires, Argentina, and Department of Organic Chemistry, Chemistry Institute, P.O. Box 6154, University of Campinas, UNICAMP, CEP: 13084-971 Campinas, SP, Brazil
| | - Rubén H. Contreras
- Departamento de Química, Universidade Estadual de Maringá, CEP-87020-900, Maringá, PR, Brazil, Department of Physics, FCEyN, University of Buenos Aires and CONICET, Buenos Aires, Argentina, and Department of Organic Chemistry, Chemistry Institute, P.O. Box 6154, University of Campinas, UNICAMP, CEP: 13084-971 Campinas, SP, Brazil
| | - Cláudio F. Tormena
- Departamento de Química, Universidade Estadual de Maringá, CEP-87020-900, Maringá, PR, Brazil, Department of Physics, FCEyN, University of Buenos Aires and CONICET, Buenos Aires, Argentina, and Department of Organic Chemistry, Chemistry Institute, P.O. Box 6154, University of Campinas, UNICAMP, CEP: 13084-971 Campinas, SP, Brazil
| |
Collapse
|
17
|
Crystal structures and theoretical calculations of trans-2,4,4-trimethyl-4-silathiane 1-oxide and 4,4-dimethyl-4-silathiane 1,1-dioxide. Struct Chem 2008. [DOI: 10.1007/s11224-008-9355-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
18
|
Wedel T, Gehring T, Podlech J, Kordel E, Bihlmeier A, Klopper W. Nucleophilic Additions to Alkylidene Bis(sulfoxides)—Stereoelectronic Effects in Vinyl Sulfoxides. Chemistry 2008; 14:4631-9. [DOI: 10.1002/chem.200701847] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
19
|
Shainyan BA, Ushakov IA, Tolstikova LL, Koch A, Kleinpeter E. N-Trifyl substituted 1,4-diheterocyclohexanes—stereodynamics and the Perlin effect. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.03.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
20
|
Shainyan BA, Ushakov IA, Meshcheryakov VI, Koch A, Kleinpeter E. Variable temperature NMR and theoretical study of the stereodynamics of 5-trifluoromethylsulfonyl-1,3,5-dioxaazinane: Perlin effect subject to heteroatom substitution. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.03.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
21
|
Juaristi E, Cuevas G. Manifestations of stereoelectronic interactions in 1JC-H one-bond coupling constants. Acc Chem Res 2007; 40:961-70. [PMID: 17596099 DOI: 10.1021/ar6000186] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two-electron/two-orbital hyperconjugative interactions depend on the relative orientation of bonds and lone pairs in a molecule and are also inversely proportional to the energy difference between the interacting orbitals. Spectroscopic manifestations of stereoelectronic interactions are particularly useful experimental signatures of these effects which can be utilized for testing molecular models. Empirical observations together with theoretical interpretations in cyclohexane and six-membered heterocycles confirm the relevance of sigma C-H ax --> sigma* C-H ax , n X --> sigma* C-H ax (X = O or N), sigma C-S --> sigma* C-H eq , beta-n O --> sigma* C-H eq , sigma C(2)-H ax --> pi* CY (Y = O, S, or CH 2), and sigma C(2)-H ax --> sigma* S-O ax two-electron/two-orbital stereoelectronic interactions that weaken the acceptor (or donor) C-H bonds and attenuate the Fermi contribution to the one-bond (13)C- (1)H coupling constants.
Collapse
Affiliation(s)
- Eusebio Juaristi
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apdo. Postal 14-740, 07000 México, D.F., Mexico.
| | | |
Collapse
|