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Klychnikov MK, Pohl R, Císařová I, Jahn U. Application of the Brook Rearrangement in Tandem with Single Electron Transfer Oxidative and Radical Processes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000126] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Mikhail K. Klychnikov
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Flemingovo náměstí 2 16610 Prague 6 Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Flemingovo náměstí 2 16610 Prague 6 Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry; Faculty of Science; Charles University in Prague; Hlavova 2030/8 12843 Prague 2 Czech Republic
| | - Ullrich Jahn
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Flemingovo náměstí 2 16610 Prague 6 Czech Republic
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Buschbeck-Alvarado ME, Hernández-Fernández G, Hernández-Trujillo J, Cortés-Guzmán F, Cuevas G. Charge transfer and electron localization as the origin of the anomeric effect in the O─C─O segment of dimethoxymethane and spiroketals. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3793] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | | | | | - Gabriel Cuevas
- Instituto de Química; Universidad Nacional Autónoma de México; Ciudad de México Mexico
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3
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Han H, Smith AB. Anion Relay Chemistry: Development of an Effective Diastereoselective [3+2] Annulation Tactic Exploiting an Aldol/Brook Rearrangement/Cyclization Cascade. Angew Chem Int Ed Engl 2017; 56:14102-14106. [PMID: 29024282 DOI: 10.1002/anie.201708017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Indexed: 11/09/2022]
Abstract
An effective [3+2] annulation tactic for the construction of diverse bicyclic compounds possessing highly functionalized cyclopentane rings has been developed employing soft ketone enolates as the initial nucleophile for anion relay chemistry (ARC). The protocol entails a highly diastereoselective aldol/Brook rearrangement/cyclization cascade.
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Affiliation(s)
- Heeoon Han
- Department of Chemistry, University of Pennsylvania, 231 S. 34th street, Philadelphia, PA, 19104, USA
| | - Amos B Smith
- Department of Chemistry, University of Pennsylvania, 231 S. 34th street, Philadelphia, PA, 19104, USA
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Han H, Smith AB. Anion Relay Chemistry: Development of an Effective Diastereoselective [3+2] Annulation Tactic Exploiting an Aldol/Brook Rearrangement/Cyclization Cascade. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Heeoon Han
- Department of Chemistry; University of Pennsylvania; 231 S. 34th street Philadelphia PA 19104 USA
| | - Amos B. Smith
- Department of Chemistry; University of Pennsylvania; 231 S. 34th street Philadelphia PA 19104 USA
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5
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Scheepstra M, Andrei SA, Unver MY, Hirsch AKH, Leysen S, Ottmann C, Brunsveld L, Milroy LG. Designed Spiroketal Protein Modulation. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Marcel Scheepstra
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
| | - Sebastian A. Andrei
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
| | - M. Yagiz Unver
- Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 7 9747AG Groningen The Netherlands
| | - Anna K. H. Hirsch
- Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 7 9747AG Groningen The Netherlands
| | - Seppe Leysen
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
- Department of Chemistry; University of Duisburg-Essen; Universitätstr. 7 45141 Essen Germany
| | - Luc Brunsveld
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
| | - Lech-Gustav Milroy
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
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Kaiser D, de la Torre A, Shaaban S, Maulide N. Metal-Free Formal Oxidative C-C Coupling by In Situ Generation of an Enolonium Species. Angew Chem Int Ed Engl 2017; 56:5921-5925. [PMID: 28429392 DOI: 10.1002/anie.201701538] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 03/11/2017] [Indexed: 01/27/2023]
Abstract
Much contemporary organic synthesis relies on transformations that are driven by the intrinsic, so-called "natural", polarity of chemical bonds and reactive centers. The design of unconventionally polarized synthons is a highly desirable strategy, as it generally enables unprecedented retrosynthetic disconnections for the synthesis of complex substances. Whereas the umpolung of carbonyl centers is a well-known strategy, polarity reversal at the α-position of a carbonyl group is much rarer. Herein, we report the design of a novel electrophilic enolonium species and its application in efficient and chemoselective, metal-free oxidative C-C coupling.
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Affiliation(s)
- Daniel Kaiser
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Wien, Austria
| | - Aurélien de la Torre
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Wien, Austria
| | - Saad Shaaban
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Wien, Austria
| | - Nuno Maulide
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090, Wien, Austria
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Kaiser D, de la Torre A, Shaaban S, Maulide N. Metallfreie formale oxidative C-C-Kupplung durch In-situ-Erzeugung einer elektrophilen Enoloniumspezies. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701538] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Daniel Kaiser
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
| | - Aurélien de la Torre
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
| | - Saad Shaaban
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
| | - Nuno Maulide
- Institut für Organische Chemie; Universität Wien; Währinger Straße 38 1090 Wien Österreich
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8
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Scheepstra M, Andrei SA, Unver MY, Hirsch AKH, Leysen S, Ottmann C, Brunsveld L, Milroy LG. Designed Spiroketal Protein Modulation. Angew Chem Int Ed Engl 2017; 56:5480-5484. [PMID: 28407400 PMCID: PMC5435924 DOI: 10.1002/anie.201612504] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 02/17/2017] [Indexed: 02/03/2023]
Abstract
Spiroketals are structural motifs found in many biologically active natural products, which has stimulated considerable efforts toward their synthesis and interest in their use as drug lead compounds. Despite this, the use of spiroketals, and especially bisbenzanulated spiroketals, in a structure-based drug discovery setting has not been convincingly demonstrated. Herein, we report the rational design of a bisbenzannulated spiroketal that potently binds to the retinoid X receptor (RXR) thereby inducing partial co-activator recruitment. We solved the crystal structure of the spiroketal-hRXRα-TIF2 ternary complex, and identified a canonical allosteric mechanism as a possible explanation for the partial agonist behavior of our spiroketal. Our co-crystal structure, the first of a designed spiroketal-protein complex, suggests that spiroketals can be designed to selectively target other nuclear receptor subtypes.
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Affiliation(s)
- Marcel Scheepstra
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
| | - Sebastian A Andrei
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
| | - M Yagiz Unver
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747AG, Groningen, The Netherlands
| | - Anna K H Hirsch
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747AG, Groningen, The Netherlands
| | - Seppe Leysen
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands.,Department of Chemistry, University of Duisburg-Essen, Universitätstr. 7, 45141, Essen, Germany
| | - Luc Brunsveld
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
| | - Lech-Gustav Milroy
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
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