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Gouda H, Nakayama N, Miura T, Kanemoto K, Ajito K. Computational study on formation of 15-membered azalactone by double reductive amination using molecular mechanics and density functional theory calculations. J Antibiot (Tokyo) 2018. [DOI: 10.1038/s41429-018-0030-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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2
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Yadav JS, Chinnam VV, Das S. Studies towards the total synthesis of (+)-13-deoxytedanolide: stereoselective synthesis of C1–C9 and C9–C17 fragments. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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3
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Naini A, Fohrer J, Kalesse M. The Synthesis of Desepoxy-Isotedanolide - A Potential Biosynthetic Precursor of Tedanolide. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500568] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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4
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Jung ME, Yoo D. Stereoselective synthesis of a fully protected C13–C23 fragment of tedanolide. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.10.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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5
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Anderl T, Nicolas L, Münkemer J, Muthukumar Y, Baro A, Frey W, Sasse F, Taylor RE, Laschat S. Synthesis and Biological Evaluation of Gephyronic Acid Derivatives: Initial Steps towards the Identification of the Biological Target of Polyketide Inhibitors of Eukaryotic Protein Synthesis. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Anderl T, Nicolas L, Münkemer J, Baro A, Sasse F, Steinmetz H, Jansen R, Höfle G, Taylor RE, Laschat S. Gephyronic acid, a missing link between polyketide inhibitors of eukaryotic protein synthesis (part II): Total synthesis of gephyronic acid. Angew Chem Int Ed Engl 2010; 50:942-5. [PMID: 21246697 DOI: 10.1002/anie.201005605] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Indexed: 11/10/2022]
Affiliation(s)
- Timo Anderl
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
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Dunetz JR, Julian LD, Newcom JS, Roush WR. Total syntheses of (+)-tedanolide and (+)-13-deoxytedanolide. J Am Chem Soc 2008; 130:16407-16. [PMID: 18980317 PMCID: PMC2645944 DOI: 10.1021/ja8063205] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Convergent total syntheses of the potent cytotoxins (+)-tedanolide (1) and (+)-13-deoxytedanolide (2) are described. The carbon framework of these compounds was assembled via a stereoselective aldol reaction that unifies the C(1)-C(12) ketone fragment 5 with a C(13)-C(23) aldehyde fragment 6 (for 13-deoxytedanolide) or 52 (for tedanolide). Multiple obstacles were encountered en route to (+)-1 and (+)-2 that required very careful selection and orchestration of the stereochemistry and functionality of key intermediates. Chief among these issues was the remarkable stability and lack of reactivity of hemiketals 33b and 34 that prevented the tedanolide synthesis from being completed from aldol 4. Key to the successful completion of the tedanolide synthesis was the observation that the 13-deoxy hemiketal 36 could be oxidized to C(11,15)-diketone 38 en route to 13-deoxytedanolide. This led to the decision to pursue the tedanolide synthesis via C(15)-(S)-epimers, since this stereochemical change would destabilize the hemiketal that plagued the attempted synthesis of tedanolide via C(15)-(R) intermediates. However, use of C(15)-(S)-configured intermediates required that the side-chain epoxide be introduced very late in the synthesis, owing to the ease with which the C(15)-(S)-OH cyclized onto the epoxide of intermediate 50.
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Affiliation(s)
- Joshua R Dunetz
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, USA
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9
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Ehrlich G, Hassfeld J, Eggert U, Kalesse M. The total synthesis of (+)-tedanolide--A macrocyclic polyketide from marine sponge Tedania ignis. Chemistry 2008; 14:2232-47. [PMID: 18165955 DOI: 10.1002/chem.200701529] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Tedanolide, which was isolated by Schmitz in 1984 from the marine sponge Tedania ignis, is a highly cytotoxic macrolide leading to strong growth inhibition of P338 tumor cells in bioassays. A unique structural feature of the known tedanolides is the primary hydroxyl group incorporated in the macrolactone. This unusual motif for macrolactones originated from PKS biosynthesis might arise through lactonizations others than those derived by the thioesterase reaction. First experimental data that support this hypothesis and reflect the inherent preference of PKS-induced macrolactonization were obtained during this synthesis. The inherent preference for the formation of a 14-membered macrocyclization is discussed together with the pivotal steps in the synthesis.
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Affiliation(s)
- Gunnar Ehrlich
- Institut für Organische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
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11
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Dunetz JR, Roush WR. Concerning the synthesis of the tedanolide C(13)-C(23) fragment via anti-aldol reaction. Org Lett 2008; 10:2059-62. [PMID: 18422319 DOI: 10.1021/ol800546g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Synthesis of C(13)-C(23) aldehyde 4, an important intermediate in a planned total synthesis of tedanolide, is described. The stereoselectivity of the key anti-aldol reaction of aldehyde 5 and ketone 6 (en route to 4) perfectly tracks the enantiomeric purity of 5. It is demonstrated that aldehyde 24, a precursor of 5, undergoes facile epimerization during a Swern oxidation and stabilized ylide olefination sequence.
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Affiliation(s)
- Joshua R Dunetz
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458, USA
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12
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13
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Abstract
The first total synthesis of the (+)-tedanolide is described. Pivotal steps are the Felkin-selective aldol coupling between C12 and C13 and an efficient Mitsunobu macrolactonization. Selective protecting group transformations and subsequent oxidations generate the macrocyclic triketone. In the endgame of the synthesis, four TBS groups are removed in one reaction and a chemo- and stereoselective final step epoxidation generates (+)-tedanolide.
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Affiliation(s)
- Gunnar Ehrlich
- Institut für Organische Chemie, Leibniz Universität Hannover, Schneiderberg 1B, D-30167 Hannover, Germany
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14
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Nyavanandi VK, Nadipalli P, Nanduri S, Naidu A, Iqbal J. A cross-metathesis approach for the synthesis of tedanolide and 13-deoxytedanolide: stereoselective synthesis of the C3–C16 segment. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.07.156] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Abstract
A convergent, stereocontrolled total synthesis of (+)-tedanolide (1), an architecturally complex marine antitumor macrolide, has been achieved in 31 steps (longest linear sequence). Highlights of the synthesis comprise a highly efficient dithiane union, followed by an Evans-Tishchenko "oxidation" to enable formation of the seco-ester in the presence of an oxidatively labile dithiane, a highly refined protecting group strategy, and a chemo- and stereoselective epoxidation at C(18,19).
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Affiliation(s)
- Amos B Smith
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA.
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Studies toward the total synthesis of tedanolide: stereoselective synthesis of the C(8)–C(17) segment. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.06.173] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Wong CM, Loh TP. Synthetic studies toward the total synthesis of tedanolide: assembly of the C1–C23 carbon backbone. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.04.044] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Iwata Y, Tanino K, Miyashita M. Synthetic studies of tedanolide, a marine macrolide displaying potent antitumor activity. Stereoselective synthesis of the C13-C23 segment. Org Lett 2006; 7:2341-4. [PMID: 15932193 DOI: 10.1021/ol050569a] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[structure: see text] A highly stereoselective synthesis of the C13-C23 segment of tedanolide (1), an 18-membered macrolide isolated from the Caribbean sponge Tedania ignis, displaying significant cytotoxicity against KB and PS tumor cell lines, is described which involves two stereoselective epoxidations of regioisomeric trisubstituted double bonds and a stereospecific S(N)2' methylation reaction of a trans-gamma,delta-epoxy-cis-alpha,beta-unsaturated ester as the key steps.
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Affiliation(s)
- Yasuhiro Iwata
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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19
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Abstract
A total synthesis of 13-deoxytedanolide is described. The synthesis features a highly stereoselective fragment assembly aldol reaction of methyl ketone 4 and aldehyde 5 to establish the complete carbon skeleton of the natural product in the form of aldol 15. The facile formation of the remarkably unreactive hemiketal 16 thwarted attempts to elaborate 15 to tedanolide. However, deoxygenation of the C(13)-hydroxyl of 16 provided the 13-deoxy hemiketal 17 that was smoothly elaborated to 13-deoxytedanolide.
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Affiliation(s)
- Lisa D Julian
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, USA
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Smith AB, Adams CM, Barbosa SAL, Degnan AP. A unified approach to the tedanolides: total synthesis of (+)-13-deoxytedanolide. Proc Natl Acad Sci U S A 2004; 101:12042-7. [PMID: 15163795 PMCID: PMC514431 DOI: 10.1073/pnas.0402084101] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A unified approach for the construction of the potent marine antitumor agents (+)-tedanolide (1) and (+)-13-deoxytedanolide (2) is described. Highlights of the synthetic strategy include the development of a versatile bifunctional dithiane-vinyl iodide linchpin, the unorthodox use of the Evans-Tishchenko reaction, and a late-stage high-risk stereocontrolled introduction of the C(18,19) epoxide to achieve a total synthesis of (+)-13-deoxytedanolide (2).
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Affiliation(s)
- Amos B Smith
- Department of Chemistry, Laboratory for Research on the Structure of Matter, and Monell Chemical Senses Center, University of Pennsylvania, Philadelphia, PA 19104, USA.
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Smith AB, Adams CM, Lodise Barbosa SA, Degnan AP. Total synthesis of (+)-13-deoxytedanolide. J Am Chem Soc 2003; 125:350-1. [PMID: 12517144 DOI: 10.1021/ja0289649] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this communication we describe the first total synthesis of (+)-13-deoxytedanolide, an architecturally complex marine macrolide possessing significant antitumor activity. The cornerstone of the synthesis comprises a highly convergent dithiane coupling used to construct the carbon skeleton, followed by a novel use of the Evans-Tishchenko reduction to oxidize the C(1) aldehyde to an ester in the presence of the oxidatively labile dithiane.
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Affiliation(s)
- Amos B Smith
- Department of Chemistry, Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia 19104, USA.
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Roush WR, Newcom JS. Studies on the synthesis of tedanolide. 2. Stereoselective synthesis of a protected C(1)-C(12) fragment. Org Lett 2002; 4:4739-42. [PMID: 12489975 DOI: 10.1021/ol0272343] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] Highly diastereoselective syntheses of diketo esters 6a and 6b are described. These intermediates undergo efficient aldol reactions with protected C(13)-C(21) aldehydes 3 and 23, thereby providing advanced C(1)-C(21) tedanolide seco ester precursors 9a and 9b.
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Affiliation(s)
- William R Roush
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, USA.
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23
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Taylor RE, Hearn BR, Ciavarri JP. A divergent approach to the myriaporones and tedanolide: completion of the carbon skeleton of myriaporone 1. Org Lett 2002; 4:2953-5. [PMID: 12182597 DOI: 10.1021/ol026356s] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] A linear but concise synthetic approach toward the structurally related natural products myriaporone and tedanolide is reported. The route is highlighted by a stereoselective homoallenylboration and a regio- and chemoselective nitrile oxide cycloaddition. Installation of the (Z)-olefin completed the carbon skeleton of myriaporone 1.
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Affiliation(s)
- Richard E Taylor
- Department of Chemistry and Biochemistry and the Walther Cancer Center, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556-5670, USA.
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