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Niggemeyer G, Knyazeva A, Gasper R, Corkery D, Bodenbinder P, Holstein JJ, Sievers S, Wu Y, Waldmann H. Synthesis of 20‐Membered Macrocyclic Pseudo‐Natural Products Yields Inducers of LC3 Lipidation. Angew Chem Int Ed Engl 2022; 61:e202114328. [PMID: 34978373 PMCID: PMC9303634 DOI: 10.1002/anie.202114328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Indexed: 01/02/2023]
Abstract
Design and synthesis of pseudo‐natural products (PNPs) through recombination of natural product (NP) fragments in unprecedented arrangements enables the discovery of novel biologically relevant chemical matter. With a view to wider coverage of NP‐inspired chemical and biological space, we describe the combination of this principle with macrocycle formation. PNP‐macrocycles were synthesized efficiently in a stereoselective one‐pot procedure including the 1,3‐dipolar cycloadditions of different dipolarophiles with dimeric cinchona alkaloid‐derived azomethine ylides formed in situ. The 20‐membered bis‐cycloadducts embody 18 stereocenters and an additional fragment‐sized NP‐structure. After further functionalization, a collection of 163 macrocyclic PNPs was obtained. Biological investigation revealed potent inducers of the lipidation of the microtubule associated protein 1 light chain 3 (LC3) protein, which plays a prominent role in various autophagy‐related processes.
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Affiliation(s)
- Georg Niggemeyer
- Max Planck Institute of Molecular Physiology Department of Chemical Biology Otto-Hahn-Strasse 11 44227 Dortmund Germany
- Technical University Dortmund Faculty of Chemistry, Chemical Biology Otto-Hahn-Strasse 6 44221 Dortmund Germany
| | - Anastasia Knyazeva
- Umeå University Department of Chemistry 90187 Umeå Sweden
- Umeå University Umeå Center for Microbial Research 90187 Umeå Sweden
| | - Raphael Gasper
- Max Planck Institute of Molecular Physiology Crystallography and Biophysics Unit Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Dale Corkery
- Umeå University Department of Chemistry 90187 Umeå Sweden
- Umeå University Umeå Center for Microbial Research 90187 Umeå Sweden
| | - Pia Bodenbinder
- Max Planck Institute of Molecular Physiology Department of Chemical Biology Otto-Hahn-Strasse 11 44227 Dortmund Germany
- Technical University Dortmund Faculty of Chemistry, Chemical Biology Otto-Hahn-Strasse 6 44221 Dortmund Germany
| | - Julian J. Holstein
- Technical University Dortmund Faculty of Chemistry, Chemical Biology Otto-Hahn-Strasse 6 44221 Dortmund Germany
- Technical University Dortmund Faculty of Chemistry, Inorganic Chemistry Otto-Hahn-Strasse 6 44221 Dortmund Germany
| | - Sonja Sievers
- Compound Management and Screening Center (COMAS) Otto-Hahn-Strasse 11 44221 Dortmund Germany
| | - Yao‐Wen Wu
- Umeå University Department of Chemistry 90187 Umeå Sweden
- Umeå University Umeå Center for Microbial Research 90187 Umeå Sweden
| | - Herbert Waldmann
- Max Planck Institute of Molecular Physiology Department of Chemical Biology Otto-Hahn-Strasse 11 44227 Dortmund Germany
- Technical University Dortmund Faculty of Chemistry, Chemical Biology Otto-Hahn-Strasse 6 44221 Dortmund Germany
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Niggemeyer G, Knyazeva A, Gasper R, Corkery D, Bodenbinder P, Holstein JJ, Sievers S, Wu Y, Waldmann H. Synthesis of 20‐Membered Macrocyclic Pseudo‐Natural Products Yields Inducers of LC3 Lipidation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Georg Niggemeyer
- Max Planck Institute of Molecular Physiology Department of Chemical Biology Otto-Hahn-Strasse 11 44227 Dortmund Germany
- Technical University Dortmund Faculty of Chemistry, Chemical Biology Otto-Hahn-Strasse 6 44221 Dortmund Germany
| | - Anastasia Knyazeva
- Umeå University Department of Chemistry 90187 Umeå Sweden
- Umeå University Umeå Center for Microbial Research 90187 Umeå Sweden
| | - Raphael Gasper
- Max Planck Institute of Molecular Physiology Crystallography and Biophysics Unit Otto-Hahn-Strasse 11 44227 Dortmund Germany
| | - Dale Corkery
- Umeå University Department of Chemistry 90187 Umeå Sweden
- Umeå University Umeå Center for Microbial Research 90187 Umeå Sweden
| | - Pia Bodenbinder
- Max Planck Institute of Molecular Physiology Department of Chemical Biology Otto-Hahn-Strasse 11 44227 Dortmund Germany
- Technical University Dortmund Faculty of Chemistry, Chemical Biology Otto-Hahn-Strasse 6 44221 Dortmund Germany
| | - Julian J. Holstein
- Technical University Dortmund Faculty of Chemistry, Chemical Biology Otto-Hahn-Strasse 6 44221 Dortmund Germany
- Technical University Dortmund Faculty of Chemistry, Inorganic Chemistry Otto-Hahn-Strasse 6 44221 Dortmund Germany
| | - Sonja Sievers
- Compound Management and Screening Center (COMAS) Otto-Hahn-Strasse 11 44221 Dortmund Germany
| | - Yao‐Wen Wu
- Umeå University Department of Chemistry 90187 Umeå Sweden
- Umeå University Umeå Center for Microbial Research 90187 Umeå Sweden
| | - Herbert Waldmann
- Max Planck Institute of Molecular Physiology Department of Chemical Biology Otto-Hahn-Strasse 11 44227 Dortmund Germany
- Technical University Dortmund Faculty of Chemistry, Chemical Biology Otto-Hahn-Strasse 6 44221 Dortmund Germany
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3
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Laraia L, Ohsawa K, Konstantinidis G, Robke L, Wu YW, Kumar K, Waldmann H. Discovery of Novel Cinchona-Alkaloid-Inspired Oxazatwistane Autophagy Inhibitors. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611670] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Luca Laraia
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
| | - Kosuke Ohsawa
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
| | - Georgios Konstantinidis
- Chemical Genomics Center of the Max Planck Society; Otto-Hahn-Str. 15 44227 Dortmund Germany
| | - Lucas Robke
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
| | - Yao-Wen Wu
- Chemical Genomics Center of the Max Planck Society; Otto-Hahn-Str. 15 44227 Dortmund Germany
| | - Kamal Kumar
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
| | - Herbert Waldmann
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Str. 6 44227 Dortmund Germany
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Laraia L, Ohsawa K, Konstantinidis G, Robke L, Wu YW, Kumar K, Waldmann H. Discovery of Novel Cinchona-Alkaloid-Inspired Oxazatwistane Autophagy Inhibitors. Angew Chem Int Ed Engl 2017; 56:2145-2150. [DOI: 10.1002/anie.201611670] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Luca Laraia
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
| | - Kosuke Ohsawa
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
| | - Georgios Konstantinidis
- Chemical Genomics Center of the Max Planck Society; Otto-Hahn-Str. 15 44227 Dortmund Germany
| | - Lucas Robke
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
| | - Yao-Wen Wu
- Chemical Genomics Center of the Max Planck Society; Otto-Hahn-Str. 15 44227 Dortmund Germany
| | - Kamal Kumar
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
| | - Herbert Waldmann
- Max Planck Institute of Molecular Physiology; Department of Chemical Biology; Otto-Hahn-Str. 11 44227 Dortmund Germany
- Technische Universität Dortmund; Fakultät Chemie und Chemische Biologie; Otto-Hahn-Str. 6 44227 Dortmund Germany
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Li X, Su J, Liu Z, Zhu Y, Dong Z, Qiu S, Wang J, Lin L, Shen Z, Yan W, Wang K, Wang R. Synthesis of Chiral α-Trifluoromethylamines with 2,2,2-Trifluoroethylamine as a “Building Block”. Org Lett 2016; 18:956-9. [DOI: 10.1021/acs.orglett.5b03566] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaoyuan Li
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jinhuan Su
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Zhourujun Liu
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Yuanyuan Zhu
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Zhenghao Dong
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Shuai Qiu
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jiayi Wang
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Li Lin
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Zhiqiang Shen
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Peoples Republic of China
| | - Wenjin Yan
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Kairong Wang
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Rui Wang
- Institute
of Pharmacology, Key Laboratory of Preclinical Study for New Drugs
of Gansu Province, School of Basic, Medical Sciences, Lanzhou University, Lanzhou 730000, China
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Peoples Republic of China
- Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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Górecki L, Mucha A, Kafarski P. Addition of H-phosphonates to quinine-derived carbonyl compounds. An unexpected C9 phosphonate-phosphate rearrangement and tandem intramolecular piperidine elimination. Beilstein J Org Chem 2014; 10:883-9. [PMID: 24778744 PMCID: PMC3999748 DOI: 10.3762/bjoc.10.85] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 03/25/2014] [Indexed: 11/23/2022] Open
Abstract
The Abramov reaction, a base-catalyzed nucleophilic addition of dialkyl H-phosphonates (phosphites) to carbonyl compounds, was performed with oxidized quinine derivatives as the substrates. Homologous aldehydes obtained from the vinyl group reacted in a typical way which led to α-hydroxyphosphonates, first reported compounds containing a direct P-C bond between the quinine carbon skeleton and a phosphorus atom. For the C9 ketones a phosphonate-phosphate rearrangement, associated with a tandem elimination of the piperidine fragment, was evidenced.
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Affiliation(s)
- Lukasz Górecki
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Artur Mucha
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Paweł Kafarski
- Department of Bioorganic Chemistry, Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
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7
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Nakamoto Y, Urabe F, Takahashi K, Ishihara J, Hatakeyama S. α-Isocupreine, an enantiocomplementary catalyst of β-isocupreidine. Chemistry 2014; 19:12653-6. [PMID: 24175342 DOI: 10.1002/chem.201302665] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Complementary chemistry! α-Isocupreine (-ICPN) was synthesized for the first time in one step from quinine by treatment with CF3SO3H (see scheme). This compound serves as an enantiocomplementary catalyst to β-isocupreidine (β-ICD) in the Morita–Baylis–Hillman reaction.
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8
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Drahl MA, Manpadi M, Williams LJ. C-C fragmentation: origins and recent applications. Angew Chem Int Ed Engl 2013; 52:11222-51. [PMID: 24115282 DOI: 10.1002/anie.201209833] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Indexed: 11/07/2022]
Abstract
It has been 60 years since Eschenmoser and Frey disclosed the archetypal CC fragmentation reaction. New fragmentations and several variants of the original quickly followed. Many of these variations, which include the Beckmann, Grob, Wharton, Marshall, and Eschenmoser-Tanabe fragmentations, have been reviewed over the intervening years. A close examination of the origins of fragmentation has not been described. Recently, useful new methods have flourished, particularly fragmentations that give alkynes and allenes, and such reactions have been applied to a range of complex motifs and natural products. This Review traces the origins of fragmentation reactions and provides a summary of the methods, applications, and new insights of heterolytic CC fragmentation reactions advanced over the last 20 years.
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Affiliation(s)
- Michael A Drahl
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, NJ 08854 (USA)
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9
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Drahl MA, Manpadi M, Williams LJ. C-C-Fragmentierung: Herkunft und jüngste Anwendungen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209833] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Crimmins MT, Dechert AMR. Enantioselective synthesis of the C1-C6 and C7-C23 fragments of the proposed structure of iriomoteolide 1a. Org Lett 2012; 14:2366-9. [PMID: 22512249 PMCID: PMC3345064 DOI: 10.1021/ol300785c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Synthesis of the C1-C6 and C7-C23 fragments of the proposed structure of iriomoteolide 1a has been accomplished. Key steps include a cross metathesis to form the C15-C16 E olefin and a chelation controlled Grignard addition to form the tertiary alcohol at C14. Notably, 7 of the 9 stereocenters of the proposed structure have been set using various aldol reactions employing metallo enolates of thiazolidinethiones.
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Affiliation(s)
- Michael T Crimmins
- Kenan, Caudill, Venable and Murray Laboratories of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States.
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11
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De Rycke N, Couty F, David ORP. Increasing the Reactivity of Nitrogen Catalysts. Chemistry 2011; 17:12852-71. [DOI: 10.1002/chem.201101755] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Indexed: 11/11/2022]
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12
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Elucidation of the active conformation of cinchona alkaloid catalyst and chemical mechanism of alcoholysis of meso anhydrides. Proc Natl Acad Sci U S A 2010; 107:20625-9. [PMID: 20566889 DOI: 10.1073/pnas.1004439107] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Complementary to enantioselective transformations of planar functionalities, catalytic desymmetrization of meso compounds is another fundamentally important strategy for asymmetric synthesis. However, experimentally established stereochemical models on how a chiral catalyst discriminates between two enantiotopic functional groups in the desymmetrization of a meso substrate are particularly lacking. This article describes our endeavor to elucidate the chemical mechanism and characterization of the active conformation of the cinchona alkaloid-derived catalyst for a desymmetrization of meso cyclic anhydrides via asymmetric alcoholysis. First, our kinetic studies indicate that the cinchona alkaloid-catalyzed alcoholysis proceeds by a general base catalysis mechanism. Furthermore, the active conformer of the cinchona alkaloid-derived catalyst DHQD-PHN was clarified by catalyst conformation studies with a designed, rigid cinchona alkaloid derivative as a probe. These key mechanistic insights enabled us to construct a stereochemical model to rationalize how DHQD-PHN differentiates the two enantiotopic carbonyl groups in the transition state of the asymmetric alcoholysis of meso cyclic anhydrides. This model not only is consistent with the sense of asymmetric induction of the asymmetric alcoholysis but also provides a rationale on how the catalyst tolerates a broad range of cyclic anhydrides. These mechanistic insights further guided us to develop a novel practical catalyst for the enantioselective alcoholysis of meso cyclic anhydrides.
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Bartók M. Unexpected inversions in asymmetric reactions: reactions with chiral metal complexes, chiral organocatalysts, and heterogeneous chiral catalysts. Chem Rev 2010; 110:1663-705. [PMID: 19873975 DOI: 10.1021/cr9002352] [Citation(s) in RCA: 310] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mihály Bartók
- Department of Organic Chemistry, University of Szeged, Stereochemistry Research Group of the Hungarian Academy of Sciences, Dóm tér 8, H-6720 Szeged, Hungary
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14
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Abermil N, Masson G, Zhu J. Invertible Enantioselectivity in 6′-Deoxy-6′-acylamino-β-isocupreidine-Catalyzed Asymmetric Aza-Morita−Baylis−Hillman Reaction: Key Role of Achiral Additive. Org Lett 2009; 11:4648-51. [DOI: 10.1021/ol901920s] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nacim Abermil
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Géraldine Masson
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Jieping Zhu
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
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15
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Kolodyazhnaya AO, Kukhar VP, Kolodyazhnyi OI. Organic catalysis of phospha-aldol condensation. RUSS J GEN CHEM+ 2008. [DOI: 10.1134/s1070363208110091] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Marcelli T, van Maarseveen JH, Hiemstra H. Cupreines and cupreidines: an emerging class of bifunctional cinchona organocatalysts. Angew Chem Int Ed Engl 2007; 45:7496-504. [PMID: 17051626 DOI: 10.1002/anie.200602318] [Citation(s) in RCA: 308] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In the steadily expanding field of organocatalysis, cinchona alkaloids play a prominent role. Until the late 1990s, bifunctional catalysts based on this scaffold relied exclusively on the C9-hydroxy group as the hydrogen-bond donor. Recently, new cinchona catalysts have been developed that feature a phenolic OH group in the C6' position-a structural feature that allows a diverse set of reactions to be catalyzed in a highly stereoselective fashion. This Minireview describes the scope and modes of action of this new class of asymmetric bifunctional organocatalysts.
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Affiliation(s)
- Tommaso Marcelli
- Van't Hoff Institute for Molecular Sciences (HIMS), Universiteit van Amsterdam, Nieuwe Achtergracht 129, 1018WS Amsterdam, The Netherlands
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Marcelli T, van Maarseveen JH, Hiemstra H. Cupreine und Cupreidine: eine außergewöhnliche Klasse von bifunktionalen Cinchona-Organokatalysatoren. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602318] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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18
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Hamama WS, El-Magid OMA, Zoorob HH. Chemistry of quinuclidines as nitrogen bicyclic bridged-ring structures. J Heterocycl Chem 2006; 43:1397-1420. [DOI: 10.1002/jhet.5570430601] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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19
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Synthesis of fluorhydrins by reaction of quinidine acetate, epiquinidine, and its acetate in superacid. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.07.083] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Debarge S, Violeau B, Jouannetaud MP, Jacquesy JC, Cousson A. Reaction of quinidine acetate, epiquinidine and its acetate in superacid: formation of gem-difluoro derivatives with or without rearrangement. Tetrahedron 2006. [DOI: 10.1016/j.tet.2005.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Nakano A, Ushiyama M, Iwabuchi Y, Hatakeyama S. Synthesis of an Enantiocomplementary Catalyst of β-Isocupreidine (β-ICD) from Quinine. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200505138] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Affiliation(s)
- H. Martin R. Hoffmann
- Department of Organic Chemistry, University of Hannover, Schneiderberg 1B, 30167 Hannover, Germany, Fax: (internat.) +49‐(0)511‐762‐3011
| | - Jens Frackenpohl
- Bayer CropScience GmbH, Gebäude G 836, Industriepark Höchst, 65926 Frankfurt am Main, Germany
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24
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The rational design of modified Cinchona alkaloid catalysts. Application to a new asymmetric synthesis of chiral chromanes. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.04.090] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Portlock DE, Naskar D, West L, Seibel WL, Gu T, Krauss HJ, Peng X, Dybas PM, Soyke EG, Ashton SB, Burton J. Positional isomerization of quinine and quinidine via rhodium on alumina catalysis: practical one-step synthesis of Δ3,10-isoquinine and Δ3,10-isoquinidine. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)01180-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Rearrangement of quinine in superacid: an efficient access to a novel chiral heterocyclic system. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)02068-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Langer P. New Strategies for the Development of an Asymmetric Version of the Baylis-Hillman Reaction This work was supported by the Fonds der Chemischen Industrie (Liebig-scholarship and funds for P. L.). P. L. thanks Prof. Dr. A. de Meijere for his support. Angew Chem Int Ed Engl 2000; 39:3049-3052. [PMID: 11028027 DOI: 10.1002/1521-3773(20000901)39:17<3049::aid-anie3049>3.0.co;2-5] [Citation(s) in RCA: 356] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- P Langer
- Institut für Organische Chemie Georg-August-Universität Göttingen Tammannstrasse 2, 37077 Göttingen (Germany)
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Braje WM, Wartchow R, Hoffmann HMR. Struktur und Mechanismus in der Cinchonaalkaloidchemie: Ein 50 Jahre altes Fehlkonzept wird widerlegt. Angew Chem Int Ed Engl 1999. [DOI: 10.1002/(sici)1521-3757(19990903)111:17<2697::aid-ange2697>3.0.co;2-j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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