1
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Alcaraz Janßen M, Thiele CM. Poly-γ-S-perillyl-l-glutamate and Poly-γ-S-perillyl-d-glutamate: Diastereomeric Alignment Media Used for the Investigation of the Alignment Process. Chemistry 2020; 26:7831-7839. [PMID: 32134524 PMCID: PMC7384199 DOI: 10.1002/chem.201905447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Indexed: 11/09/2022]
Abstract
Residual dipolar couplings (RDCs) offer additional information for structure elucidation by NMR spectroscopy. They are measured in anisotropic media, such as lyotropic liquid crystalline phases of polypeptides. Today, some suitable polypeptides are known. Nevertheless, structural influences of these polypeptides on the alignment properties are not really understood. Thus, which influence a chiral side chain has on enantiodiscrimination and whether we can improve the enantiodifferentiation significantly by adding an additional chiral center in the side chain are questions of interest. Therefore, new diastereomeric polypeptide-based alignment media with an additional chiral center in the side chain derived from perillyl alcohol were synthesized and their properties were investigated (secondary structure, liquid crystallinity, etc.). The enantiomers of isopinocampheol and β-pinene were used as model analytes for the study of enantiodiscrimination. Additionally, the usage of 1 H-1 H-RDCs to improve the alignment tensor quality is demonstrated.
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Affiliation(s)
- Marcel Alcaraz Janßen
- Clemens-Schöpf-Institut für Organische Chemie und BiochemieTechnical University of DarmstadtAlarich-Weiss-Str. 1664287DarmstadtGermany
| | - Christina M. Thiele
- Clemens-Schöpf-Institut für Organische Chemie und BiochemieTechnical University of DarmstadtAlarich-Weiss-Str. 1664287DarmstadtGermany
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2
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Sinnaeve D, Ilgen J, Di Pietro ME, Primozic JJ, Schmidts V, Thiele CM, Luy B. Probing Long‐Range Anisotropic Interactions: a General and Sign‐Sensitive Strategy to Measure
1
H–
1
H Residual Dipolar Couplings as a Key Advance for Organic Structure Determination. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Davy Sinnaeve
- Univ. LilleInsermInstitut Pasteur de LilleCHU LilleU1167—Labex DISTALZ—RID-AGE—Risk Factors and Molecular Determinants of Aging-Related Diseases 59000 Lille France
- CNRS, ERL9002—Integrative Structural Biology 59000 Lille France
- Department of Organic and Macromolecular ChemistryGhent University, Campus Sterre, S4 Krijgslaan 281 9000 Ghent Belgium
| | - Julian Ilgen
- Clemens-Schöpf Institut für Organische Chemie und BiochemieTechnische Universität Darmstadt Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Maria Enrica Di Pietro
- Institute of Organic Chemistry and Institute for Biological Interfaces 4—Magnetic ResonanceKarlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
- Current address: Department of ChemistryMaterials and Chemical Engineering “Giulio Natta”Politecnico di Milano Piazza Leonardo da Vinci 32 20133 Milan Italy
| | - Johann J. Primozic
- Clemens-Schöpf Institut für Organische Chemie und BiochemieTechnische Universität Darmstadt Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Volker Schmidts
- Clemens-Schöpf Institut für Organische Chemie und BiochemieTechnische Universität Darmstadt Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Christina M. Thiele
- Clemens-Schöpf Institut für Organische Chemie und BiochemieTechnische Universität Darmstadt Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Burkhard Luy
- Institute of Organic Chemistry and Institute for Biological Interfaces 4—Magnetic ResonanceKarlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
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3
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Sinnaeve D, Ilgen J, Di Pietro ME, Primozic JJ, Schmidts V, Thiele CM, Luy B. Probing Long-Range Anisotropic Interactions: a General and Sign-Sensitive Strategy to Measure 1 H- 1 H Residual Dipolar Couplings as a Key Advance for Organic Structure Determination. Angew Chem Int Ed Engl 2020; 59:5316-5320. [PMID: 31945235 DOI: 10.1002/anie.201915278] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Indexed: 11/10/2022]
Abstract
Residual dipolar couplings (RDCs) are amongst the most powerful NMR parameters for organic structure elucidation. In order to maximize their effectiveness in increasingly complex cases such as flexible compounds, a maximum of RDCs between nuclei sampling a large distribution of orientations is needed, including sign information. For this, the easily accessible one-bond 1 H-13 C RDCs alone often fall short. Long-range 1 H-1 H RDCs are both abundant and typically sample highly complementary orientations, but accessing them in a sign-sensitive way has been severely obstructed due to the overflow of 1 H-1 H couplings. Here, we present a generally applicable strategy that allows the measurement of a large number of 1 H-1 H RDCs, including their signs, which is based on a combination of an improved PSYCHEDELIC method and a new selective constant-time β-COSY experiment. The potential of 1 H-1 H RDCs to better determine molecular alignment and to discriminate between enantiomers and diastereomers is demonstrated.
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Affiliation(s)
- Davy Sinnaeve
- Univ. Lille, Inserm, Institut Pasteur de Lille, CHU Lille, U1167-Labex DISTALZ-RID-AGE-Risk Factors and Molecular Determinants of Aging-Related Diseases, 59000, Lille, France.,CNRS, ERL9002-Integrative Structural Biology, 59000, Lille, France.,Department of Organic and Macromolecular Chemistry, Ghent University, Campus Sterre, S4, Krijgslaan 281, 9000, Ghent, Belgium
| | - Julian Ilgen
- Clemens-Schöpf Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Maria Enrica Di Pietro
- Institute of Organic Chemistry and Institute for Biological Interfaces 4-Magnetic Resonance, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany.,Current address: Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
| | - Johann J Primozic
- Clemens-Schöpf Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Volker Schmidts
- Clemens-Schöpf Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Christina M Thiele
- Clemens-Schöpf Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Burkhard Luy
- Institute of Organic Chemistry and Institute for Biological Interfaces 4-Magnetic Resonance, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany
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Knoll K, Leyendecker M, Thiele CM. l
‐Valine Derivatised 1,3,5‐Benzene‐Tricarboxamides as Building Blocks for a New Supramolecular Organogel‐Like Alignment Medium. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801306] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Kevin Knoll
- Technische Universität Darmstadt Clemens‐Schöpf Institut für Organische Chemie und Biochemie Alarich‐Weiss‐Str. 4 64287 Darmstadt Germany
| | - Martin Leyendecker
- Technische Universität Darmstadt Clemens‐Schöpf Institut für Organische Chemie und Biochemie Alarich‐Weiss‐Str. 4 64287 Darmstadt Germany
| | - Christina M. Thiele
- Technische Universität Darmstadt Clemens‐Schöpf Institut für Organische Chemie und Biochemie Alarich‐Weiss‐Str. 4 64287 Darmstadt Germany
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Schwab M, Schmidts V, Thiele CM. Thermoresponsive Alignment Media in NMR Spectroscopy: Helix Reversal of a Copolyaspartate at Ambient Temperatures. Chemistry 2018; 24:14373-14377. [PMID: 29999196 DOI: 10.1002/chem.201803540] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Indexed: 11/07/2022]
Abstract
Poly(aspartic acid esters) are known to form either right-or left-handed α-helices depending on the ester group in the side chain, on solvent and/or on temperature. Polyphenethyl-l-aspartates (PPLA) exhibit a helix reversal from the right- to the left-handed form with increasing temperature. We have recently reported the application of polyphenethylaspartates as helically chiral alignment media. The thermoresponsivity observed for these polymers offers the possibility to measure different orientations of analytes before and after helix reversal of the alignment medium at 373 K. Herein we present a synthesized copolymer of phenethyl- and benzylaspartate as a new alignment medium undergoing this helix reversal at 303-313 K. Thus, the measurement of residual dipolar couplings (RDC) before and after the helix reversal is allowed for at ambient temperatures. A complete sign change of all 1 H-13 C RDCs was observed, which is close to the highest possible difference in NMR spectra.
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Affiliation(s)
- Mira Schwab
- Clemens-Schöpf Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Volker Schmidts
- Clemens-Schöpf Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
| | - Christina M Thiele
- Clemens-Schöpf Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany
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Determination of the conformational states of strychnine in solution using NMR residual dipolar couplings in a tensor-free approach. Methods 2018; 148:4-8. [PMID: 30036639 DOI: 10.1016/j.ymeth.2018.07.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/10/2018] [Accepted: 07/17/2018] [Indexed: 12/14/2022] Open
Abstract
Small molecules with rotatable bonds can occupy different conformational states in solution as a consequence of their thermal fluctuations. The accurate determination of the structures of such states, as well as of their statistical weights, has been challenging because of the technical difficulties in extracting information from experimental measurements, which are normally averaged over the conformational space available. Here, to achieve this objective, we present an approach based on a recently proposed tensor-free method for incorporating NMR residual dipolar couplings as structural restraints in replica-averaged molecular dynamics simulations. This approach enables the information provided by the experimental data to be used in the spirit of the maximum entropy principle to determine the structural ensembles of small molecules. Furthermore, in order to enhance the sampling of the conformational space we incorporated the metadynamics method in the simulations. We illustrate the method in the case of strychnine, determining the three major conformational states of this small molecule and their associated occupation probabilities.
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7
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Schwab M, Herold D, Thiele CM. Polyaspartates as Thermoresponsive Enantiodifferentiating Helically Chiral Alignment Media for Anisotropic NMR Spectroscopy. Chemistry 2017; 23:14576-14584. [DOI: 10.1002/chem.201702884] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Mira Schwab
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 4 64287 Darmstadt Germany
| | - Dominik Herold
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 4 64287 Darmstadt Germany
| | - Christina M. Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 4 64287 Darmstadt Germany
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8
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Hansmann S, Schmidts V, Thiele CM. Synthesis of Poly-γ-S-2-methylbutyl-l-glutamate and Poly-γ-S-2-methylbutyl-d-glutamate and Their Use as Enantiodiscriminating Alignment Media in NMR Spectroscopy. Chemistry 2017; 23:9114-9121. [DOI: 10.1002/chem.201700699] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Stefanie Hansmann
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Str. 4 64287 Darmstadt Germany
| | - Volker Schmidts
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Str. 4 64287 Darmstadt Germany
| | - Christina M. Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Str. 4 64287 Darmstadt Germany
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9
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Fredersdorf M, Kurz M, Bauer A, Ebert MO, Rigling C, Lannes L, Thiele CM. Conformational Analysis of an Antibacterial Cyclodepsipeptide Active against Mycobacterium tuberculosis
by a Combined ROE and RDC Analysis. Chemistry 2017; 23:5729-5735. [DOI: 10.1002/chem.201605143] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Maic Fredersdorf
- Sanofi-Aventis GmbH; Department of Chemistry; Industriepark Hoechst 65926 Frankfurt am Main Germany
- Technische Universität Darmstadt; Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Michael Kurz
- Sanofi-Aventis GmbH; Department of Chemistry; Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Armin Bauer
- Sanofi-Aventis GmbH; Department of Chemistry; Industriepark Hoechst 65926 Frankfurt am Main Germany
| | - Marc-Olivier Ebert
- ETH Zürich; Laboratorium für Organische Chemie, D-CHAB; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Carla Rigling
- ETH Zürich; Laboratorium für Organische Chemie, D-CHAB; Vladimir-Prelog-Weg 3 8093 Zürich Switzerland
| | - Laurie Lannes
- Present address: Center for Biomolecular Magnetic Resonance; BMRZ); Institute of Organic Chemistry and Chemical Biology; Johann Wolfgang Goethe Universität Frankfurt; Max-von-Laue-Straße 7 60438 Frankfurt Germany
| | - Christina Marie Thiele
- Technische Universität Darmstadt; Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Alarich-Weiss-Straße 4 64287 Darmstadt Germany
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Procházková E, Kolmer A, Ilgen J, Schwab M, Kaltschnee L, Fredersdorf M, Schmidts V, Wende RC, Schreiner PR, Thiele CM. Uncovering Key Structural Features of an Enantioselective Peptide-Catalyzed Acylation Utilizing Advanced NMR Techniques. Angew Chem Int Ed Engl 2016; 55:15754-15759. [DOI: 10.1002/anie.201608559] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Eliška Procházková
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
- On leave from Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic; Flemingovo nám. 2 166 10 Prague Czech Republic
| | - Andreas Kolmer
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Julian Ilgen
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Mira Schwab
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Lukas Kaltschnee
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Maic Fredersdorf
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Volker Schmidts
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
| | - Raffael C. Wende
- Institut für Organische Chemie; Justus-Liebig-Universität; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Peter R. Schreiner
- Institut für Organische Chemie; Justus-Liebig-Universität; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Christina M. Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Strasse 16 64287 Darmstadt Germany
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Procházková E, Kolmer A, Ilgen J, Schwab M, Kaltschnee L, Fredersdorf M, Schmidts V, Wende RC, Schreiner PR, Thiele CM. Aufklärung entscheidender struktureller Aspekte einer enantioselektiven Peptid-katalysierten Acylierung mittels moderner NMR-Techniken. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608559] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Eliška Procházková
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
- Beurlaubt vom Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic; Flemingovo nám. 2 166 10 Prague Tschechische Republik
| | - Andreas Kolmer
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Julian Ilgen
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Mira Schwab
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Lukas Kaltschnee
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Maic Fredersdorf
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Volker Schmidts
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
| | - Raffael C. Wende
- Institut für Organische Chemie; Justus-Liebig-Universität; Heinrich-Buff-Ring 17 35392 Gießen Deutschland
| | - Peter R. Schreiner
- Institut für Organische Chemie; Justus-Liebig-Universität; Heinrich-Buff-Ring 17 35392 Gießen Deutschland
| | - Christina M. Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie; Technische Universität Darmstadt; Alarich-Weiss-Straße 16 64287 Darmstadt Deutschland
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Thiele CM, Kolmer A. Response to "Comment on "Conformational analysis of small organic molecules using NOE and RDC data: A discussion of strychnine and α-methylene-γ-butyrolactone" by I.A. Khodov, M.G. Kiselev, V.V. Klochkov, S.V. Efimov [http://dx.doi.org/10.1016/j.jmr.2016.02.009]" - Or Life is about compromises. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2016; 266:69-72. [PMID: 26947752 DOI: 10.1016/j.jmr.2016.02.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 02/12/2016] [Indexed: 06/05/2023]
Affiliation(s)
- Christina M Thiele
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Strasse 16, 64287 Darmstadt, Germany
| | - Andreas Kolmer
- Clemens-Schöpf-Institut für Organische Chemie und Biochemie, Technische Universität Darmstadt, Alarich-Weiss-Strasse 16, 64287 Darmstadt, Germany
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Niklas T, Steinmetzger C, Liu W, Zell D, Stalke D, Ackermann L, John M. Determination of the Relative Configuration of β-Amino Acid Esters Based on Residual Dipolar Couplings. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500941] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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14
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Fredersdorf M, Göstl R, Kolmer A, Schmidts V, Monecke P, Hecht S, Thiele CM. Exploring the Conformational Space of Bridge-Substituted Dithienylcyclopentenes. Chemistry 2015; 21:14545-54. [DOI: 10.1002/chem.201501842] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Indexed: 11/08/2022]
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15
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Schmidt M, Reinscheid F, Sun H, Abromeit H, Scriba GKE, Sönnichsen FD, John M, Reinscheid UM. Hidden Flexibility of Strychnine. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301760] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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16
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Trigo-Mouriño P, de la Fuente MC, Gil RR, Sánchez-Pedregal VM, Navarro-Vázquez A. Conformational Analysis of the Anti-obesity Drug Lorcaserin in Water: How To Take Advantage of Long-Range Residual Dipolar Couplings. Chemistry 2013; 19:14989-97. [DOI: 10.1002/chem.201202509] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 06/28/2013] [Indexed: 11/07/2022]
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17
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Meyer NC, Krupp A, Schmidts V, Thiele CM, Reggelin M. Polyacetylenes as Enantiodifferentiating Alignment Media. Angew Chem Int Ed Engl 2012; 51:8334-8. [DOI: 10.1002/anie.201201891] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 06/22/2012] [Indexed: 11/05/2022]
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Meyer NC, Krupp A, Schmidts V, Thiele CM, Reggelin M. Polyacetylenes as Enantiodifferentiating Alignment Media. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201891] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Trigo-Mouriño P, Navarro-Vázquez A, Ying J, Gil RR, Bax A. Structural discrimination in small molecules by accurate measurement of long-range proton-carbon NMR residual dipolar couplings. Angew Chem Int Ed Engl 2011; 50:7576-80. [PMID: 21751308 PMCID: PMC3184250 DOI: 10.1002/anie.201101739] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 06/17/2011] [Indexed: 11/09/2022]
Abstract
Accurate measurement of long-range CH residual dipolar couplings (RDCs) (2D CH and 3D CH) by a new selective J -scaled HSQC experiment significantly improves the structural discrimination power of RDCs in small molecules with multiple stereocenters. The extraction of the long-range couplings is clean and straightforward, and in most cases yields the sign of the RDC too. The experiment is demonstrated with 10-epi-8-deoxycumambrin B, a tricyclic natural compound with five chiral centers.
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Affiliation(s)
- Pablo Trigo-Mouriño
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Ave, Pittsburgh, PA 15213, USA Fax: (+1) 412-268-1061
| | | | - Jinfa Ying
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Roberto R. Gil
- Department of Chemistry, Carnegie Mellon University 4400 Fifth Ave, Pittsburgh, PA 15213, USA Fax: (+1) 412-268-1061
| | - Ad Bax
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
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Trigo-Mouriño P, Navarro-Vázquez A, Ying J, Gil RR, Bax A. Structural Discrimination in Small Molecules by Accurate Measurement of Long-Range Proton-Carbon NMR Residual Dipolar Couplings. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201101739] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Napolitano JG, Gavín JA, García C, Norte M, Fernández JJ, Daranas AH. On the configuration of five-membered rings: a spin-spin coupling constant approach. Chemistry 2011; 17:6338-47. [PMID: 21547972 DOI: 10.1002/chem.201100412] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Indexed: 11/06/2022]
Abstract
Five-membered rings are clearly among the most common structural motifs found in chemistry and biology. Nevertheless, the configuration of conformationally mobile five-membered rings is often difficult to assign from nuclear magnetic resonance (NMR) data. A simple, reliable, and efficient approach for the stereochemical analysis of five-membered rings based on the measurement of NMR coupling constants is presented. Density functional theory calculations using representative conformations of the full conformational space available to rings with different substitution patterns were used to identify differences between the accessible coupling constant values for cis and trans relative orientations of the substituents. The calculations were assessed experimentally using NMR data obtained from a number of models. This approach can be easily used to analyze different five-membered rings, such as oxolanes, cyclopentanes, furanosides and pyrrolidines, and their relative configuration can be determined without the need for making further conformational considerations.
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Affiliation(s)
- José G Napolitano
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
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Marx A, Böttcher B, Thiele C. Enhancing the Orienting Properties of Poly(γ-benzyl-L-glutamate) by means of Additives. Chemistry 2010; 16:1656-63. [DOI: 10.1002/chem.200902287] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Böttcher B, Schmidts V, Raskatov J, Thiele C. Bestimmung der Konformation des Schlüsselintermediats einer enantioselektiven Palladium-katalysierten allylischen Substitution mithilfe dipolarer Restkopplungen. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200903649] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Böttcher B, Schmidts V, Raskatov J, Thiele C. Determination of the Conformation of the Key Intermediate in an Enantioselective Palladium-Catalyzed Allylic Substitution from Residual Dipolar Couplings. Angew Chem Int Ed Engl 2009; 49:205-9. [DOI: 10.1002/anie.200903649] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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