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Lücke D, Kalesse M. Development of the Synthesis of Desepoxy-Tedanolide C. J Org Chem 2024; 89:2408-2430. [PMID: 38271689 PMCID: PMC10877616 DOI: 10.1021/acs.joc.3c02437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/01/2024] [Accepted: 01/08/2024] [Indexed: 01/27/2024]
Abstract
We are presenting the development of our route for the total synthesis of desepoxy-tedanolide C. Through the obtained analytical data, the proposed structure of tedanolide C is questioned and a different configuration for this natural product is proposed. Key steps of the synthesis are a Kiyooka aldol reaction that builds up the tertiary alcohol flanked by three oxygenated carbon atoms and two aldol reactions used for fragment couplings. A Julia-Kocienski olefination was used for installation of the side chain. Besides the successful synthesis, the development for the protecting group setup of the southwestern hemisphere is described in detail as well as another retrosynthetic attempt for building up the target molecule.
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Affiliation(s)
- Daniel Lücke
- Institute
of Organic Chemistry, Gottfried Wilhelm Leibniz Universität
Hannover, Schneiderberg
1B, 30167Hannover, Germany
| | - Markus Kalesse
- Institute
of Organic Chemistry, Gottfried Wilhelm Leibniz Universität
Hannover, Schneiderberg
1B, 30167Hannover, Germany
- Centre
of Biomolecular Drug Research (BMWZ), Gottfried
Wilhelm Leibniz Universität Hannover, Schneiderberg 38, 30167Hannover, Germany
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Abstract
The synthesis of desepoxy‐tedanolide C was accomplished and provided experimental evidence on the configuration of tedanolide C. The reported chemical shifts and coupling constants point to a configuration different from the published structure and analogous to the structures of the other members of this family of natural products. The key step is a Kiyooka aldol protocol for the stereoselective synthesis of the tertiary alcohol flanked by three additional oxygenated carbon atoms. Furthermore, two additional aldol reactions and a Julia–Kocienski olefination were used to assemble the carbon framework.
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Affiliation(s)
- Daniel Lücke
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany
| | - Markus Kalesse
- Institute of Organic Chemistry, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167, Hannover, Germany.,Centre of Biomolecular Drug Research (BMWZ), Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany.,Helmholtz Centre for Infection Research (HZI), Inhoffenstrasse 7, 38124, Braunschweig, Germany
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Muthukumar Y, Münkemer J, Mathieu D, Richter C, Schwalbe H, Steinmetz H, Kessler W, Reichelt J, Beutling U, Frank R, Büssow K, van den Heuvel J, Brönstrup M, Taylor RE, Laschat S, Sasse F. Investigations on the mode of action of gephyronic acid, an inhibitor of eukaryotic protein translation from myxobacteria. PLoS One 2018; 13:e0201605. [PMID: 30063768 PMCID: PMC6067752 DOI: 10.1371/journal.pone.0201605] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Accepted: 07/18/2018] [Indexed: 11/19/2022] Open
Abstract
The identification of inhibitors of eukaryotic protein biosynthesis, which are targeting single translation factors, is highly demanded. Here we report on a small molecule inhibitor, gephyronic acid, isolated from the myxobacterium Archangium gephyra that inhibits growth of transformed mammalian cell lines in the nM range. In direct comparison, primary human fibroblasts were shown to be less sensitive to toxic effects of gephyronic acid than cancer-derived cells. Gephyronic acid is targeting the protein translation system. Experiments with IRES dual luciferase reporter assays identified it as an inhibitor of the translation initiation. DARTs approaches, co-localization studies and pull-down assays indicate that the binding partner could be the eukaryotic initiation factor 2 subunit alpha (eIF2α). Gephyronic acid seems to have a different mode of action than the structurally related polyketides tedanolide, myriaporone, and pederin and is a valuable tool for investigating the eukaryotic translation system. Because cancer derived cells were found to be especially sensitive, gephyronic acid could potentially find use as a drug candidate.
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Affiliation(s)
- Yazh Muthukumar
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Johanna Münkemer
- Institut für Organische Chemie, Universität Stuttgart, Stuttgart, Germany
| | - Daniel Mathieu
- Zentrum für Biomolekulare Magnetische Resonanz, Universität Frankfurt, Frankfurt, Germany
| | - Christian Richter
- Zentrum für Biomolekulare Magnetische Resonanz, Universität Frankfurt, Frankfurt, Germany
| | - Harald Schwalbe
- Zentrum für Biomolekulare Magnetische Resonanz, Universität Frankfurt, Frankfurt, Germany
| | - Heinrich Steinmetz
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Wolfgang Kessler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Joachim Reichelt
- Department of Structure and Function of Proteins, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Ulrike Beutling
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Ronald Frank
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Konrad Büssow
- Department of Structure and Function of Proteins, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Joop van den Heuvel
- Department of Structure and Function of Proteins, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Mark Brönstrup
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Richard E. Taylor
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Stuttgart, Germany
- * E-mail: (FS); (SL)
| | - Florenz Sasse
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
- * E-mail: (FS); (SL)
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Zambrana J, Romea P, Urpí F. Studies towards the synthesis of tedanolide C. Construction of the C13-epi C1–C15 fragment. Org Biomol Chem 2016; 14:5219-23. [PMID: 27215808 DOI: 10.1039/c6ob00896h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An advanced intermediate on route towards tedanolide C has been synthesized using highly stereoselective substrate-controlled titanium-mediated aldol reactions.
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Affiliation(s)
- Joana Zambrana
- Secció de Química Orgànica
- Departament de Química Inorgànica i Orgànica
- and Institut de Biomedicina de la Universitat de Barcelona (IBUB)
- Universitat de Barcelona
- 08028 Barcelona
| | - Pedro Romea
- Secció de Química Orgànica
- Departament de Química Inorgànica i Orgànica
- and Institut de Biomedicina de la Universitat de Barcelona (IBUB)
- Universitat de Barcelona
- 08028 Barcelona
| | - Fèlix Urpí
- Secció de Química Orgànica
- Departament de Química Inorgànica i Orgànica
- and Institut de Biomedicina de la Universitat de Barcelona (IBUB)
- Universitat de Barcelona
- 08028 Barcelona
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