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Tsuchikawa H, Minamino K, Hayashi S, Murata M. Efficient Access to the Functionalized Bicyclic Pharmacophore of Spirolide C by Using a Selective Diels–Alder Reaction. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700164] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hiroshi Tsuchikawa
- Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Kou Minamino
- Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Sho Hayashi
- Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
| | - Michio Murata
- Graduate School of Science Osaka University 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
- ERATO Lipid Active Structure Project Science and Technology Agency 1-1 Machikaneyama Toyonaka Osaka 560-0043 Japan
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2
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Heravi MM, Zadsirjan V, Farajpour B. Applications of oxazolidinones as chiral auxiliaries in the asymmetric alkylation reaction applied to total synthesis. RSC Adv 2016. [DOI: 10.1039/c6ra00653a] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this review, a number of applications of chiral oxazolidinones in the asymmetric alkylation reaction applied to total synthesis are described.
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Affiliation(s)
- Majid M. Heravi
- Department of Chemistry
- School of Science
- Alzahra University
- Tehran
- Iran
| | - Vahideh Zadsirjan
- Department of Chemistry
- School of Science
- Alzahra University
- Tehran
- Iran
| | - Behnaz Farajpour
- Department of Chemistry
- School of Science
- Alzahra University
- Tehran
- Iran
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Labarre-Lainé J, Periñan I, Desvergnes V, Landais Y. Synthesis of the C10-C24-bis-spiroacetal core of 13-desmethyl spirolide C based on a sila-Stetter-acetalization process. Chemistry 2014; 20:9336-41. [PMID: 24925107 DOI: 10.1002/chem.201402894] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Indexed: 11/11/2022]
Abstract
Synthesis of the bis-spiroacetal core of 13-desmethyl spirolide C has been completed based on a sila-Stetter-acetalization process. The acylsilane and enone partners in the Stetter reaction were prepared in 7 and 11 steps, respectively, from (S) and (R)-aspartic acid. The quaternary center at C19 in the enone moiety was controlled by relying on the Seebach's chiral self-reproduction method using an enantiopure (S)-lactic acid based dioxolanone. The final acid-catalyzed spiroacetalization provided the desired spiroacetal as a mixture of diastereoisomers in 13 linear steps. Whatever the conditions used, the non-natural transoid isomer was formed preferentially. However, both cisoid and transoid isomers were isolated pure and their structure assigned unambiguously through NMR spectroscopic studies.
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Affiliation(s)
- Jessica Labarre-Lainé
- University of Bordeaux, 351, Cours de la libération, 33405 Talence Cedex (France), Fax: (+33) 5-40-00-62-86
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4
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Xiao Q, Young K, Zakarian A. An efficient synthesis of the fully elaborated isoindolinone unit of muironolide A. Org Lett 2013; 15:3314-7. [PMID: 23826676 DOI: 10.1021/ol401354a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
An efficient stereocontrolled construction of the fully substituted isoindolone subunit of muironolide A is described. The approach is centered on the intramolecular Diels-Alder reaction between the enol form of the β-keto amide and an α,β,γ,δ-unsaturated ester, followed by the installation of the cyclohexene double bond.
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Affiliation(s)
- Qing Xiao
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, USA
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5
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Araoz R, Servent D, Molgó J, Iorga BI, Fruchart-Gaillard C, Benoit E, Gu Z, Stivala C, Zakarian A. Total synthesis of pinnatoxins A and G and revision of the mode of action of pinnatoxin A. J Am Chem Soc 2011; 133:10499-511. [PMID: 21644584 PMCID: PMC3365589 DOI: 10.1021/ja201254c] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Pinnatoxins belong to an emerging class of potent marine toxins of the cyclic imine group. Detailed studies of their biological effects have been impeded by unavailability of the complex natural product from natural sources. This work describes the development of a robust, scalable synthetic sequence relying on a convergent strategy that delivered a sufficient amount of the toxin for detailed biological studies and its commercialization for use by other research groups and regulatory agencies. A central transformation in the synthesis is the highly diastereoselective Ireland-Claisen rearrangement of a complex α,α-disubstituted allylic ester based on a unique mode for stereoselective enolization through a chirality match between the substrate and the lithium amide base. With synthetic pinnatoxin A, a detailed study has been performed that provides conclusive evidence for its mode of action as a potent inhibitor of nicotinic acetylcholine receptors selective for the human neuronal α7 subtype. The comprehensive electrophysiological, biochemical, and computational studies support the view that the spiroimine subunit of pinnatoxins is critical for blocking nicotinic acetylcholine receptor subtypes, as evidenced by analyzing the effect of a synthetic analogue of pinnatoxin A containing an open form of the imine ring. Our studies have paved the way for the production of certified standards to be used for mass-spectrometric determination of these toxins in marine matrices and for the development of tests to detect these toxins in contaminated shellfish.
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Affiliation(s)
- Romulo Araoz
- Institut de Neurobiologie Alfred Fessard, FRC2118, Laboratoire de Neurobiologie et Développement, UPR-3294, Centre National de la Recherche Scientifique, F-91198 Gif-sur-Yvette cedex, France
| | - Denis Servent
- Service d'Ingénierie Moléculaire des Protéines, Laboratoire de Toxinologie Moléculaire et Biotechnologies, Commissariat à l'Energie Atomique, F-91191 Gif-sur-Yvette, France
| | - Jordi Molgó
- Institut de Neurobiologie Alfred Fessard, FRC2118, Laboratoire de Neurobiologie et Développement, UPR-3294, Centre National de la Recherche Scientifique, F-91198 Gif-sur-Yvette cedex, France
| | - Bogdan I. Iorga
- Institut de Chimie des Substances Naturelles, UPR 2301, Centre National de la Recherche Scientifique, F-91198 Gif-sur-Yvette cedex, France
| | - Carole Fruchart-Gaillard
- Service d'Ingénierie Moléculaire des Protéines, Laboratoire de Toxinologie Moléculaire et Biotechnologies, Commissariat à l'Energie Atomique, F-91191 Gif-sur-Yvette, France
| | - Evelyne Benoit
- Institut de Neurobiologie Alfred Fessard, FRC2118, Laboratoire de Neurobiologie et Développement, UPR-3294, Centre National de la Recherche Scientifique, F-91198 Gif-sur-Yvette cedex, France
| | - Zhenhua Gu
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Craig Stivala
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Armen Zakarian
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
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6
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Yang W, Wei X, Pan Y, Lee R, Zhu B, Liu H, Yan L, Huang KW, Jiang Z, Tan CH. Highly Enantio- and Diastereoselective Synthesis of β-Methyl-γ-monofluoromethyl-Substituted Alcohols. Chemistry 2011; 17:8066-70. [DOI: 10.1002/chem.201100929] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Indexed: 11/07/2022]
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Beaumont S, Ilardi EA, Tappin NDC, Zakarian A. Marine Toxins with Spiroimine Rings: Total Synthesis of Pinnatoxin A. European J Org Chem 2010; 2010:5743-5765. [PMID: 21461316 DOI: 10.1002/ejoc.201000842] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This microreview provides a compilation of synthetic approaches and total syntheses of pinnatoxin A in a survey of the literature up to early 2010. Pinnatoxin A is the first discovered and representative member of a fascinating group of potent marine toxins that share a spiroimine subunit as a unifying structural element.
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Affiliation(s)
- Stéphane Beaumont
- Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA 93106, USA
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Ilardi EA, Isaacman MJ, Qin YC, Shelly SA, Zakarian A. Consecutive sigmatropic rearrangements in the enantioselective total synthesis of (−)-joubertinamine and (−)-mesembrine. Tetrahedron 2009. [DOI: 10.1016/j.tet.2008.10.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Stivala CE, Zakarian A. Studies toward the synthesis of spirolides: assembly of the elaborated E-ring fragment. Org Lett 2009; 11:839-42. [PMID: 19199776 DOI: 10.1021/ol8027797] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A stereoselective synthesis of the spiroimine fragment of spirolide C is described. The congested C7 and C29 tertiary and quaternary centers are constructed by a diastereoselective Ireland-Claisen rearrangement. The E ring is completed by means of an aldol cyclocondensation. Additional studies were preformed on the advanced intermediate to probe a future coupling strategy.
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Affiliation(s)
- Craig E Stivala
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106-9510, USA
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Affiliation(s)
- Seiichi Nakamura
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan.
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12
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Nakamura S, Kikuchi F, Hashimoto S. Stereoselective synthesis of a C1–C6 fragment of pinnatoxin A via a 1,4-addition/alkylation sequence. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.04.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Affiliation(s)
- Craig E. Stivala
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390
| | - Armen Zakarian
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390
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