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Liu H, Lin S, Jacobsen KM, Poulsen TB. Chemische Synthesen und chemische Biologie von Carboxylpolyether‐Ionophoren: Aktuelle Entwicklungen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812982] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Han Liu
- Department of ChemistryAarhus University Langelandsgade 140 8000 Aarhus C Dänemark
| | - Shaoquan Lin
- Department of ChemistryAarhus University Langelandsgade 140 8000 Aarhus C Dänemark
| | - Kristian M. Jacobsen
- Department of ChemistryAarhus University Langelandsgade 140 8000 Aarhus C Dänemark
| | - Thomas B. Poulsen
- Department of ChemistryAarhus University Langelandsgade 140 8000 Aarhus C Dänemark
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Liu H, Lin S, Jacobsen KM, Poulsen TB. Chemical Syntheses and Chemical Biology of Carboxyl Polyether Ionophores: Recent Highlights. Angew Chem Int Ed Engl 2019; 58:13630-13642. [PMID: 30793459 DOI: 10.1002/anie.201812982] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Indexed: 12/21/2022]
Abstract
A central goal of chemical biology is to develop molecular probes that enable fundamental studies of cellular systems. In the hierarchy of bioactive molecules, the so-called ionophore class occupies an unflattering position in the lower branches, with typical labels being "non-specific" and "toxic". In fact, the mere possibility that a candidate molecule possesses "ionophore activity" typically prompts its removal from further studies; ionophores-from a chemical genetics perspective-are molecular outlaws. In stark contrast to this overall poor reputation of ionophores, synthetic chemistry owes some of its most amazing achievements to studies of ionophore natural products, in particular the carboxyl polyethers renowned for their intricate molecular structures. These compounds have for decades been academic battlegrounds where new synthetic methodology is tested and retrosynthetic tactics perfected. Herein, we review the most exciting recent advances in carboxyl polyether ionophore (CPI) synthesis and in addition discuss the burgeoning field of CPI chemical biology.
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Affiliation(s)
- Han Liu
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Shaoquan Lin
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Kristian M Jacobsen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
| | - Thomas B Poulsen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000, Aarhus C, Denmark
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3
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Chen LA, Ashley MA, Leighton JL. Evolution of an Efficient and Scalable Nine-Step (Longest Linear Sequence) Synthesis of Zincophorin Methyl Ester. J Am Chem Soc 2017; 139:4568-4573. [PMID: 28266852 DOI: 10.1021/jacs.7b01590] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Because of both their synthetically challenging and stereochemically complex structures and their wide range of often clinically relevant biological activities, nonaromatic polyketide natural products have for decades attracted an enormous amount of attention from synthetic chemists and played an important role in the development of modern asymmetric synthesis. Often, such compounds are not available in quantity from natural sources, rendering analogue synthesis and drug development efforts extremely resource-intensive and time-consuming. In this arena, the quest for ever more step-economical and efficient methods and strategies, useful and important goals in their own right, takes on added importance, and the most useful syntheses will combine high levels of step-economy with efficiency and scalability. The nonaromatic polyketide natural product zincophorin methyl ester has attracted significant attention from synthetic chemists due primarily to the historically synthetically challenging C(8)-C(12) all-anti stereopentad. While great progress has been made in the development of new methodologies to more directly address this problem and as a result in the development of more highly step-economical syntheses, a synthesis that combines high levels of step economy with high levels of efficiency and scalability has remained elusive. To address this problem, we have devised a new synthesis of zincophorin methyl ester that proceeds in just nine steps in the longest linear sequence and proceeds in 10% overall yield. Additionally, the scalability and practicability of the route have been demonstrated by performing all of the steps on a meaningful scale. This synthesis thus represents by a significant margin the most step-economical, efficient, and practicable synthesis of this stereochemically complex natural product reported to date, and is well suited to facilitate the synthesis of analogues and medicinal chemistry development efforts in a time- and resource-efficient manner.
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Affiliation(s)
- Liang-An Chen
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - Melissa A Ashley
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - James L Leighton
- Department of Chemistry, Columbia University , New York, New York 10027, United States
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4
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Feng J, Kasun ZA, Krische MJ. Enantioselective Alcohol C-H Functionalization for Polyketide Construction: Unlocking Redox-Economy and Site-Selectivity for Ideal Chemical Synthesis. J Am Chem Soc 2016; 138:5467-78. [PMID: 27113543 PMCID: PMC4871165 DOI: 10.1021/jacs.6b02019] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The development and application of stereoselective and site-selective catalytic methods that directly convert lower alcohols to higher alcohols are described. These processes merge the characteristics of transfer hydrogenation and carbonyl addition, exploiting alcohols and π-unsaturated reactants as redox pairs, which upon hydrogen transfer generate transient carbonyl-organometal pairs en route to products of C-C coupling. Unlike classical carbonyl additions, stoichiometric organometallic reagents and discrete alcohol-to-carbonyl redox reactions are not required. Additionally, due to a kinetic preference for primary alcohol dehydrogenation, the site-selective modification of glycols and higher polyols is possible, streamlining or eliminating use of protecting groups. The total syntheses of several iconic type I polyketide natural products were undertaken using these methods. In each case, the target compounds were prepared in significantly fewer steps than previously achieved.
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Affiliation(s)
- Jiajie Feng
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Zachary A. Kasun
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
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5
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Kasun ZA, Gao X, Lipinski RM, Krische MJ. Direct Generation of Triketide Stereopolyads via Merged Redox-Construction Events: Total Synthesis of (+)-Zincophorin Methyl Ester. J Am Chem Soc 2015; 137:8900-3. [PMID: 26167950 PMCID: PMC4527649 DOI: 10.1021/jacs.5b05296] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
(+)-Zincophorin methyl ester is prepared in 13 steps (longest linear sequence). A bidirectional redox-triggered double anti-crotylation of 2-methyl-1,3-propane diol directly assembles the triketide stereopolyad spanning C4-C12, significantly enhancing step economy and enabling construction of (+)-zincophorin methyl ester in nearly half the steps previously required.
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Affiliation(s)
- Zachary A. Kasun
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | - Xin Gao
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
| | | | - Michael J. Krische
- University of Texas at Austin, Department of Chemistry, Austin, TX 78712, USA
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6
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Yadav JS, Gyanchander E, Das S. Application of oxetane ring opening toward stereoselective synthesis of zincophorin fragment. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Cooksey JP. Synthesis of a C1-C11 fragment of Zincophorin using planar chiral, neutral π-allyl iron complexes. Org Biomol Chem 2013; 11:5117-26. [PMID: 23812275 DOI: 10.1039/c3ob40894a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A key step in the synthesis of a C1-C11 fragment of the ionophore antibiotic Zincophorin involves the addition of an α-alkoxyalkylcopper(I) reagent to a planar chiral, neutral π-allyl iron complex. The key allylic alkylation reaction is highly regio- and stereoselective with addition taking place at the γ-position anti to the metal centre.
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Affiliation(s)
- John P Cooksey
- School of Chemistry, University of Leeds, Leeds LS2 9JT, UK.
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8
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Yus M, González-Gómez JC, Foubelo F. Diastereoselective Allylation of Carbonyl Compounds and Imines: Application to the Synthesis of Natural Products. Chem Rev 2013; 113:5595-698. [DOI: 10.1021/cr400008h] [Citation(s) in RCA: 398] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Miguel Yus
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
| | - José C. González-Gómez
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
| | - Francisco Foubelo
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
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9
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Jammi S, Mouysset D, Siri D, Bertrand MP, Feray L. Theoretical Support for the Involvement of a Radical Pathway in the Formation of Allenylzincs from Propargyl Iodides and Dialkylzincs: Influence of Zinc Coordination. J Org Chem 2013; 78:1589-603. [DOI: 10.1021/jo302704g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Suribabu Jammi
- Aix-Marseille
Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, Equipes †CMO and ‡CT, 13397 Cedex 20, Marseille, France
| | - Dominique Mouysset
- Aix-Marseille
Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, Equipes †CMO and ‡CT, 13397 Cedex 20, Marseille, France
| | - Didier Siri
- Aix-Marseille
Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, Equipes †CMO and ‡CT, 13397 Cedex 20, Marseille, France
| | - Michèle P. Bertrand
- Aix-Marseille
Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, Equipes †CMO and ‡CT, 13397 Cedex 20, Marseille, France
| | - Laurence Feray
- Aix-Marseille
Université, CNRS, Institut de Chimie Radicalaire, UMR 7273, Equipes †CMO and ‡CT, 13397 Cedex 20, Marseille, France
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10
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Mochirian P, Godin F, Katsoulis I, Fontaine I, Brazeau JF, Guindon Y. A Bidirectional Approach to the Synthesis of Polypropionates: Synthesis of C1–C13 Fragment of Zincophorin and Related Isomers. J Org Chem 2011; 76:7654-76. [DOI: 10.1021/jo2013884] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Philippe Mochirian
- (IRCM), Bio-organic Chemistry Laboratory, Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec, Canada H2W 1R7
- Département de Chimie, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal, Québec, Canada H3C 3J7
| | - François Godin
- (IRCM), Bio-organic Chemistry Laboratory, Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec, Canada H2W 1R7
- Département de Chimie, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal, Québec, Canada H3C 3J7
| | - Ioannis Katsoulis
- NCSR “Demokritos”, Institute of Physical Chemistry, Agia Paraskevi, GR 15310, Greece
| | - Isabelle Fontaine
- (IRCM), Bio-organic Chemistry Laboratory, Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec, Canada H2W 1R7
- Département de Chimie, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal, Québec, Canada H3C 3J7
| | - Jean-François Brazeau
- Department of Chemistry, University of California, 619 Latimer Hall, Berkeley, California, 94720, United States
| | - Yvan Guindon
- (IRCM), Bio-organic Chemistry Laboratory, Institut de Recherches Cliniques de Montréal, 110 Avenue des Pins Ouest, Montréal, Québec, Canada H2W 1R7
- Département de Chimie, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal, Québec, Canada H3C 3J7
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec, Canada, H3A 2K6
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11
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Bizet V, Lefebvre V, Baudoux J, Lasne MC, Boulangé A, Leleu S, Franck X, Rouden J. Metal-Free SN2′ Decarboxylative Rearrangement of β-Keto Esters. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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12
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Harrison TJ, Ho S, Leighton JL. Toward more "ideal" polyketide natural product synthesis: a step-economical synthesis of zincophorin methyl ester. J Am Chem Soc 2011; 133:7308-11. [PMID: 21524078 PMCID: PMC3092851 DOI: 10.1021/ja201467z] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly efficient and step-economical synthesis of zincophorin methyl ester has been achieved. The unprecedented step economy of this zincophorin synthesis is principally due to an application of the tandem silylformylation-crotylsilylation/Tamao oxidation-diastereoselective tautomerization reaction, which achieves in a single step what would typically require a significant multistep sequence.
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Affiliation(s)
- Tyler J Harrison
- Department of Chemistry, Columbia University, New York, New York 10027, USA
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Song Z, Lohse AG, Hsung RP. Challenges in the synthesis of a unique mono-carboxylic acid antibiotic, (+)-zincophorin. Nat Prod Rep 2009; 26:560-71. [PMID: 19642422 PMCID: PMC2828946 DOI: 10.1039/b821450f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
(+)-Zincophorin, also referred to as M144255 or griseocholin, is a polyoxygenated ionophoric antibiotic that was isolated from Streptomyces griseus in 1984. It possesses strong in vivo activity against Gram-positive bacteria and Clostridium coelchii. Its methyl ester was reported in a patent as having strong inhibitory properties against influenza WSN/virus with reduced toxicity for the host cell. Its ability to strongly bind with Zn2+, which is also present in its X-ray structure, is the basis for its name. Over the last two decades, (+)-zincophorin has attracted an impressive array of synthetic efforts including Danishefsky's first total synthesis, along with two recent elegant total syntheses reported by Cossy and Miyashita as well as our own formal total synthesis. This review provides a comparison of the different synthetic efforts on this novel mono-carboxylic acid antibiotic and documents its interesting isolation, structure determination, and biological activities.
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Affiliation(s)
- Zhenlei Song
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry, West China School of Pharmacy, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, P. R. China
| | - Andrew G. Lohse
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI 53705 USA
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI 53705 USA
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14
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Brazeau JF, Mochirian P, Prévost M, Guindon Y. Stereopentads Derived from a Sequence of Mukaiyama Aldolization and Free Radical Reduction on α-Methyl-β-alkoxy Aldehydes: A General Strategy for Efficient Polypropionate Synthesis. J Org Chem 2008; 74:64-74. [DOI: 10.1021/jo8021583] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jean-François Brazeau
- Institut de recherches cliniques de Montréal (IRCM), Bio-organic Chemistry Laboratory, 110 Avenue des Pins Ouest, Montréal, Québec, Canada H2W 1R7, Department of Chemistry, Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, Québec, Canada H3C 3J7, and Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec, Canada H3A 2K6
| | - Philippe Mochirian
- Institut de recherches cliniques de Montréal (IRCM), Bio-organic Chemistry Laboratory, 110 Avenue des Pins Ouest, Montréal, Québec, Canada H2W 1R7, Department of Chemistry, Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, Québec, Canada H3C 3J7, and Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec, Canada H3A 2K6
| | - Michel Prévost
- Institut de recherches cliniques de Montréal (IRCM), Bio-organic Chemistry Laboratory, 110 Avenue des Pins Ouest, Montréal, Québec, Canada H2W 1R7, Department of Chemistry, Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, Québec, Canada H3C 3J7, and Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec, Canada H3A 2K6
| | - Yvan Guindon
- Institut de recherches cliniques de Montréal (IRCM), Bio-organic Chemistry Laboratory, 110 Avenue des Pins Ouest, Montréal, Québec, Canada H2W 1R7, Department of Chemistry, Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, Québec, Canada H3C 3J7, and Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec, Canada H3A 2K6
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15
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Linder D, Buron F, Constant S, Lacour J. Enantioselective CpRu-Catalyzed Carroll Rearrangement - Ligand and Metal Source Importance. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800854] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Austeri M, Buron F, Constant S, Lacour J, Linder D, Müller J, Tortoioli S. Enantio- and regioselective CpRu-catalyzed Carroll rearrangement. PURE APPL CHEM 2008. [DOI: 10.1351/pac200880050967] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The addition of unstabilized carbonyl nucleophiles to allyl-metal fragments still represents a challenge for generating stereoselectively tertiary (and quaternary) stereogenic centers. In this context, the decarboxylative Carroll rearrangement of secondary and tertiary allyl β-ketoesters is particularly interesting since chiral γ,δ-unsaturated ketones are obtained. Herein, we show that CpRu half-sandwich complexes can, in the presence of selected enantiopure diimine ligands, catalyze this transformation and afford complete conversions and decent level of enantiomeric excess. Zwitterionic adducts of a hexacoordinated phosphorus anion and CpRu moieties were also associated and shown to generate air-, moisture-, and microwave-stable catalysts that can be readily purified and recycled. Carroll rearrangements of allylic β-ketoesters performed with these zwitterionic species occur with better regio- and enantioselectivity.
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Affiliation(s)
- Martina Austeri
- 1Department of Organic Chemistry, University of Geneva, quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland
| | - Frederic Buron
- 1Department of Organic Chemistry, University of Geneva, quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland
| | - Samuel Constant
- 1Department of Organic Chemistry, University of Geneva, quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland
| | - Jerome Lacour
- 1Department of Organic Chemistry, University of Geneva, quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland
| | - David Linder
- 1Department of Organic Chemistry, University of Geneva, quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland
| | - Jessica Müller
- 1Department of Organic Chemistry, University of Geneva, quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland
| | - Simone Tortoioli
- 1Department of Organic Chemistry, University of Geneva, quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland
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17
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Song Z, Hsung RP, Lu T, Lohse AG. Studies on a urea-directed Stork-Crabtree hydrogenation. Synthesis of the C1-C9 subunit of (+)-zincophorin. J Org Chem 2007; 72:9722-31. [PMID: 17979293 DOI: 10.1021/jo7017922] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A detailed account on the stereoselective synthesis of the C1-C9 subunit of (+)-zincophorin is described here. This approach features the first application of a stereoselective inverse electron demand hetero-[4 + 2] cycloaddition of chiral allenamides in natural product synthesis. The C1-C9 subunit matches Cossy's intermediate, thereby constituting a formal total synthesis. In addition, details of an unusual urea-directed Stork-Crabtree hydrogenation observed during these efforts are also disclosed here.
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Affiliation(s)
- Zhenlei Song
- Division of Pharmaceutical Sciences and Department of Chemistry, Rennebohm Hall, 777 Highland Avenue, University of Wisconsin, Madison, Wisconsin 53705, USA
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18
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Constant S, Tortoioli S, Müller J, Lacour J. An Enantioselective CpRu-Catalyzed Carroll Rearrangement. Angew Chem Int Ed Engl 2007; 46:2082-5. [PMID: 17278172 DOI: 10.1002/anie.200604573] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Samuel Constant
- Département de Chimie Organique, Université de Genève quai Ernest Ansermet 30, 1211 Genève 4, Switzerland
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19
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Constant S, Tortoioli S, Müller J, Lacour J. An Enantioselective CpRu-Catalyzed Carroll Rearrangement. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604573] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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20
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Bourgeois D, Craig D, Grellepois F, Mountford DM, Stewart AJ. A [3,3]-sigmatropic process catalysed by acetate. The decarboxylative Claisen rearrangement. Tetrahedron 2006. [DOI: 10.1016/j.tet.2005.09.073] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Bourgeois D, Craig D, King NP, Mountford DM. Synthesis of Homoallylic Sulfones through a Decarboxylative Claisen Rearrangement Reaction. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200462023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Bourgeois D, Craig D, King NP, Mountford DM. Synthesis of Homoallylic Sulfones through a Decarboxylative Claisen Rearrangement Reaction. Angew Chem Int Ed Engl 2005; 44:618-21. [PMID: 15612061 DOI: 10.1002/anie.200462023] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Damien Bourgeois
- Department of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, UK
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Defosseux M, Blanchard N, Meyer C, Cossy J. Total Synthesis of Zincophorin and Its Methyl Ester. J Org Chem 2004; 69:4626-47. [PMID: 15230584 DOI: 10.1021/jo0496042] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A total synthesis of the naturally occurring ionophore zincophorin has been realized. The route features an intramolecular oxymercuration of a cyclopropanemethanol and a Carroll-Claisen rearrangement for the respective elaboration of the C1-C12 and C13-C25 subunits, which have been assembled by using a highly diastereoselective titanium-mediated aldol condensation.
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Affiliation(s)
- Magali Defosseux
- Laboratoire de Chimie Organique, asocié au CNRS, ESPCI, 10 rue Vauquelin 75231 Paris Cedex 05 - France
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