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Lee RJ, Lindley MR, Pritchard GJ, Kimber MC. A biosynthetically inspired route to substituted furans using the Appel reaction: total synthesis of the furan fatty acid F 5. Chem Commun (Camb) 2018; 53:6327-6330. [PMID: 28548154 DOI: 10.1039/c7cc03229c] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Appel reaction conditions have been harnessed to affect a mild biosynthetically inspired dehydration of endoperoxides to deliver multi-substituted electron rich furans. Unlike traditional dehydrative procedures, this method is metal and acid free, and can be achieved under redox neutral conditions. It is general for a range of aryl and alkyl substituted endoperoxides, and is functional group tolerant. Furthermore, this procedure has been used to deliver an effective total synthesis of the furan fatty acid (FFA) F5.
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Affiliation(s)
- Robert J Lee
- School of Science, Department of Chemistry, Loughborough University, Loughborough, LE11 3TU, UK.
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2
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Blaess M, Bibak N, Claus RA, Kohl M, Bonaterra GA, Kinscherf R, Laufer S, Deigner HP. NB 06: From a simple lysosomotropic aSMase inhibitor to tools for elucidating the role of lysosomes in signaling apoptosis and LPS-induced inflammation. Eur J Med Chem 2017; 153:73-104. [PMID: 29031494 DOI: 10.1016/j.ejmech.2017.09.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 08/29/2017] [Accepted: 09/13/2017] [Indexed: 01/13/2023]
Abstract
Ceramide generation is involved in signal transduction of cellular stress response, in particular during stress-induced apoptosis in response to stimuli such as minimally modified Low-density lipoproteins, TNFalpha and exogenous C6-ceramide. In this paper we describe 48 diverse synthetic products and evaluate their lysosomotropic and acid sphingomyelinase inhibiting activities in macrophages. A stimuli-induced increase of C16-ceramide in macrophages can be almost completely suppressed by representative compound NB 06 providing an effective protection of macrophages against apoptosis. Compounds like NB 06 thus offer highly interesting fields of application besides prevention of apoptosis of macrophages in atherosclerotic plaques in vessel walls. Most importantly, they can be used for blocking pH-dependent lysosomal processes and enzymes in general as well as for analyzing lysosomal dependent cellular signaling. Modulation of gene expression of several prominent inflammatory messengers IL1B, IL6, IL23A, CCL4 and CCL20 further indicate potentially beneficial effects in the field of (systemic) infections involving bacterial endotoxins like LPS or infections with influenza A virus.
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Affiliation(s)
- Markus Blaess
- Furtwangen University, Medical and Life Sciences Faculty, Institute of Precision Medicine, Jakob-Kienzle-Str. 17, D-78054 Villingen-Schwenningen, Germany; Clinic for Anesthesiology and Intensive Care, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany
| | - Nelly Bibak
- Furtwangen University, Medical and Life Sciences Faculty, Institute of Precision Medicine, Jakob-Kienzle-Str. 17, D-78054 Villingen-Schwenningen, Germany
| | - Ralf A Claus
- Clinic for Anesthesiology and Intensive Care, Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany; Center for Sepsis Control and Care (CSCC), Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany
| | - Matthias Kohl
- Furtwangen University, Medical and Life Sciences Faculty, Institute of Precision Medicine, Jakob-Kienzle-Str. 17, D-78054 Villingen-Schwenningen, Germany
| | - Gabriel A Bonaterra
- Institute of Anatomy and Cell Biology, Department of Medical Cell Biology, University of Marburg, Robert-Koch-Straße 8, D-35032 Marburg, Germany
| | - Ralf Kinscherf
- Institute of Anatomy and Cell Biology, Department of Medical Cell Biology, University of Marburg, Robert-Koch-Straße 8, D-35032 Marburg, Germany
| | - Stefan Laufer
- Pharmaceutical Institute, Department of Pharmaceutical Chemistry, University of Tuebingen, Auf der Morgenstelle 8, D-72076 Tuebingen, Germany
| | - Hans-Peter Deigner
- Furtwangen University, Medical and Life Sciences Faculty, Institute of Precision Medicine, Jakob-Kienzle-Str. 17, D-78054 Villingen-Schwenningen, Germany; Fraunhofer Institute IZI, Leipzig, EXIM Department, Schillingallee 68, D-18057 Rostock, Germany.
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Morcillo SP, Leboeuf D, Bour C, Gandon V. Calcium-Catalyzed Synthesis of Polysubstituted 2-Alkenylfurans from β-Keto Esters Tethered to Propargyl Alcohols. Chemistry 2016; 22:16974-16978. [DOI: 10.1002/chem.201603929] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Sara P. Morcillo
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
| | - David Leboeuf
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
| | - Christophe Bour
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Univ. Paris-Sud; Université Paris-Saclay; bâtiment 420 91405 Orsay cedex France
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4
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Optimised total syntheses of the F-furan fatty acids F 5 and F 6 and some deuterated derivatives. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.05.061] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Nitsch D, Bach T. Bismuth(III) Triflate-Catalyzed Synthesis of Substituted 2-Alkenylfurans. J Org Chem 2014; 79:6372-9. [DOI: 10.1021/jo5009993] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dominik Nitsch
- Lehrstuhl
für Organische
Chemie I and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Thorsten Bach
- Lehrstuhl
für Organische
Chemie I and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
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W. Knight D, W. T. Smith A. Optimized Syntheses of the Furan Fatty Acids F5 and F6 Featuring Convertion of a β-Iodofuran into a β-Methylfuran in a Single Operation. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)63] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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7
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Furan fatty acid as an anti-inflammatory component from the green-lipped mussel Perna canaliculus. Proc Natl Acad Sci U S A 2011; 108:17533-7. [PMID: 21972415 DOI: 10.1073/pnas.1110577108] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A lipid extract of Perna canaliculus (New Zealand green-lipped mussel) has reportedly displayed anti-inflammatory effects in animal models and in human controlled studies. However, the anti-inflammatory lipid components have not been investigated in detail due to the instability of the lipid extract, which has made the identification of the distinct active components a formidable task. Considering the instability of the active component, we carefully fractionated a lipid extract of Perna canaliculus (Lyprinol) and detected furan fatty acids (F-acids). These naturally but rarely detected fatty acids show potent radical-scavenging ability and are essential constituents of plants and algae. Based on these data, it has been proposed that F-acids could be potential antioxidants, which may contribute to the protective properties of fish and fish oil diets against chronic inflammatory diseases. However, to date, in vivo data to support the hypothesis have not been obtained, presumably due to the limited availability of F-acids. To confirm the in vivo anti-inflammatory effect of F-acids in comparison with that of eicosapentaenoic acid (EPA), we developed a semisynthetic preparation and examined its anti-inflammatory activity in a rat model of adjuvant-induced arthritis. Indeed, the F-acid ethyl ester exhibited more potent anti-inflammatory activity than that of the EPA ethyl ester. We report on the in vivo activity of F-acids, confirming that the lipid extract of the green-lipped mussel includes an unstable fatty acid that is more effective than EPA.
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Schnapperelle I, Breitenlechner S, Bach T. Regioselective Oxidative Coupling Reactions of 3-Substituted Thiophenes with Arylboronic Acids. Org Lett 2011; 13:3640-3. [DOI: 10.1021/ol201292v] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Ingo Schnapperelle
- Lehrstuhl für Organische Chemie I and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Stefan Breitenlechner
- Lehrstuhl für Organische Chemie I and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Thorsten Bach
- Lehrstuhl für Organische Chemie I and Catalysis Research Center, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
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Ram RN, Charles I. Unexpected Aromatization of 2-Acetoxy-3, 3-dichloro-4-(α-chloroalkyl)tetrahydrofurans to 3-Alkyl-4-chlorofurans with NaI/DMF. SYNTHETIC COMMUN 2008. [DOI: 10.1080/00397910801997678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ram N. Ram
- a Department of Chemistry, Indian Institute of Technology , New Delhi, India
| | - I. Charles
- a Department of Chemistry, Indian Institute of Technology , New Delhi, India
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Pereira R, Furst A, Iglesias B, Germain P, Gronemeyer H, de Lera AR. Insights into the mechanism of the site-selective sequential palladium-catalyzed cross-coupling reactions of dibromothiophenes/dibromothiazoles and arylboronic acids. Synthesis of PPARbeta/delta agonists. Org Biomol Chem 2006; 4:4514-25. [PMID: 17268648 DOI: 10.1039/b612235c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A reactivity study, aided by NMR spectroscopy, allowed a mechanistic rationale to be postulated for the palladium-catalyzed regioselective coupling of arylboronic acid (and arylstannane where feasible) at the position next to the sulfur atom in functionalized dibromothiophenes and dibromothiazoles. The analysis of the NMR spectra (using 19F from the boronic acid CF3 group and 31P from the phosphine of the catalyst as probes) of the entire reaction starting from the dibromoheterocycles allowed the qualitative proposal that the transmetalation is the rate-limiting step for both sequential substitution processes. The extremely facile oxidative addition at the C-Br bond next to the sulfur atom of the heterocycle instead determines the positional selectivity. An additional Stille reaction then replaced the second halogen, providing the trisubstituted heterocyclic scaffolds of PPAR ligands, which displayed PPARbeta/delta agonist activity, as revealed by reporter assays in living cells.
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Affiliation(s)
- Raquel Pereira
- Departamento de Química Orgánica, Universidade de Vigo, 36310, Vigo, Spain
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Spiteller G. Furan fatty acids: occurrence, synthesis, and reactions. Are furan fatty acids responsible for the cardioprotective effects of a fish diet? Lipids 2006; 40:755-71. [PMID: 16296395 DOI: 10.1007/s11745-005-1438-5] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Furan FA (F-acids) are tri- or tetrasubstituted furan derivatives characterized by either a propyl or pentyl side chain in one of the alpha-positions; the other is substituted by a straight long-chain saturated acid with a carboxylic group at its end. F-acids are generated in large amounts in algae, but they are also produced by plants and microorganisms. Fish and other marine organisms as well as mammals consume F-acids in their food and incorporate them into phospholipids and cholesterol esters. F-acids are catabolized to dibasic urofuran acids, which are excreted in the urine. The biogenetic precursor of the most abundant F-acid, F6, is linoleic acid. Methyl groups in the beta-position are derived from adenosylmethionine. Owing to the different alkyl substituents, synthesis of F-acids requires multistep reactions. F-acids react readily with peroxyl radicals to generate dioxoenes. The radical-scavenging ability of F-acids may contribute to the protective properties of fish and fish oil diets against mortality from heart disease.
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Affiliation(s)
- Gerhard Spiteller
- Lehrstuhl für Organische Chemie I, University of Bayreuth, Bayreuth, Germany.
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Handy ST, Zhang Y. A simple guide for predicting regioselectivity in the coupling of polyhaloheteroaromatics. Chem Commun (Camb) 2006:299-301. [PMID: 16391740 DOI: 10.1039/b512948f] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple guide for predicting the order and site of coupling (Suzuki, Stille, Negishi, Sonogashira, etc.) in polyhaloheteroaromatics based upon the (1)H NMR chemical shift values of the parent non-halogenated heteroaromatics has been developed.
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Affiliation(s)
- Scott T Handy
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, 37132, USA.
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Handy ST, Zhang Y. APPROACHES TO THE SYNTHESIS OF THE LAMELLARINS AND RELATED NATURAL PRODUCTS. A REVIEW. ORG PREP PROCED INT 2005. [DOI: 10.1080/00304940509354977] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Schröter S, Stock C, Bach T. Regioselective cross-coupling reactions of multiple halogenated nitrogen-, oxygen-, and sulfur-containing heterocycles. Tetrahedron 2005. [DOI: 10.1016/j.tet.2004.11.074] [Citation(s) in RCA: 337] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Bach T, Bartels M. Synthesis of eupomatenoids by three consecutive transition metal-catalyzed cross-coupling reactions. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)02287-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Sebahar HL, Yoshida K, Hegedus LS. Effect of adjacent chiral tertiary and quaternary centers on the metal-catalyzed allylic substitution reaction. J Org Chem 2002; 67:3788-95. [PMID: 12027695 DOI: 10.1021/jo0200318] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The metal-catalyzed allylic substitution reaction of 5a,b and 6a was examined. Reaction with stabilized nucleophiles led to exclusive attack at the less-hindered allylic terminus, and the stereoselectivity varied with the bidentate ligand used but favored retention. The yields and reaction times were improved with the use of microwaves. Alkylation via transmetalation was only observed with phenyl- and vinylstannatranes and gave regio- and stereoselectivity opposite those observed with the stabilized anions. The epimeric carbonates 5a and 5b displayed very different reactivities. Catalysts containing metals other than palladium were completely unreactive and led to recovered starting material.
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Affiliation(s)
- Holly L Sebahar
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
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17
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Lee JH, Park JS, Cho CG. Regioselective synthesis of 3-alkynyl-5-bromo-2-pyrones via Pd-catalyzed couplings on 3,5-dibromo-2-pyrone. Org Lett 2002; 4:1171-3. [PMID: 11922810 DOI: 10.1021/ol025613q] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] 3,5-Dibromo-2-pyrone underwent facile Pd(0)-catalyzed coupling reactions with various alkynes to give rise to the corresponding 3-alkynyl-5-bromo-2-pyrones with good to excellent chemical yields and regioselectivity.
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Affiliation(s)
- Jin-Hee Lee
- Department of Chemistry, Hanyang University, Seoul 133-791, Korea
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18
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Hegedus LS. Transition metals in organic synthesis: highlights for the year 1998 (25th Anniversary). Coord Chem Rev 2000. [DOI: 10.1016/s0010-8545(99)00172-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nakamura I, Saito S, Yamamoto Y. Hydrofurylation of Alkylidenecyclopropanes Catalyzed by Palladium. J Am Chem Soc 2000. [DOI: 10.1021/ja9940165] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Itaru Nakamura
- Department of Chemistry, Graduate School of Science and Research Center for Organic Resource and Material Chemistry Institute for Chemical Reaction Science Tohoku University, Sendai 980-8578, Japan
| | - Shinichi Saito
- Department of Chemistry, Graduate School of Science and Research Center for Organic Resource and Material Chemistry Institute for Chemical Reaction Science Tohoku University, Sendai 980-8578, Japan
| | - Yoshinori Yamamoto
- Department of Chemistry, Graduate School of Science and Research Center for Organic Resource and Material Chemistry Institute for Chemical Reaction Science Tohoku University, Sendai 980-8578, Japan
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Synthesis of 2-(o-hydroxyaryl)-4-arylthiazoles by regioselective Pd(0)-catalyzed cross-coupling. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)00018-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Bach T, Krüger L. The Preparation of 2,3,5-Tri- and 2,3-Disubstituted Furans by Regioselective Palladium(0)-Catalyzed Coupling Reactions: Application to the Syntheses of Rosefuran and the F5 Furan Fatty Acid. European J Org Chem 1999. [DOI: 10.1002/(sici)1099-0690(199909)1999:9<2045::aid-ejoc2045>3.0.co;2-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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