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Enantioselective Total Synthesis and Structural Revision of Dysiherbol A
A 12‐step total synthesis of the natural product dysiherbol A, a strongly anti‐inflammatory and anti‐tumor avarane meroterpene isolated from the marine sponge Dysidea sp., was elaborated. As key steps, the synthesis features an enantioselective Cu‐catalyzed 1,4‐addition/enolate‐trapping opening move...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8251742/ https://www.ncbi.nlm.nih.gov/pubmed/33978302 http://dx.doi.org/10.1002/anie.202105733 |
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author | Baars, Julian Grimm, Isabelle Blunk, Dirk Neudörfl, Jörg‐Martin Schmalz, Hans‐Günther |
author_facet | Baars, Julian Grimm, Isabelle Blunk, Dirk Neudörfl, Jörg‐Martin Schmalz, Hans‐Günther |
author_sort | Baars, Julian |
collection | PubMed |
description | A 12‐step total synthesis of the natural product dysiherbol A, a strongly anti‐inflammatory and anti‐tumor avarane meroterpene isolated from the marine sponge Dysidea sp., was elaborated. As key steps, the synthesis features an enantioselective Cu‐catalyzed 1,4‐addition/enolate‐trapping opening move, an Au‐catalyzed double cyclization to build up the tetracyclic core‐carbon skeleton, and a late installation of the C5‐bridgehead methyl group via proton‐induced cyclopropane opening associated with spontaneous cyclic ether formation. The obtained pentacyclic compound (corresponding to an anhydride of the originally suggested structure for dysiherbol A) showed identical spectroscopic data as the natural product, but an opposite molecular rotation. CD‐spectroscopic measurements finally confirmed that both the constitution and the absolute configuration of the originally proposed structure of (+)‐dysiherbol A need to be revised. |
format | Online Article Text |
id | pubmed-8251742 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-82517422021-07-07 Enantioselective Total Synthesis and Structural Revision of Dysiherbol A Baars, Julian Grimm, Isabelle Blunk, Dirk Neudörfl, Jörg‐Martin Schmalz, Hans‐Günther Angew Chem Int Ed Engl Communications A 12‐step total synthesis of the natural product dysiherbol A, a strongly anti‐inflammatory and anti‐tumor avarane meroterpene isolated from the marine sponge Dysidea sp., was elaborated. As key steps, the synthesis features an enantioselective Cu‐catalyzed 1,4‐addition/enolate‐trapping opening move, an Au‐catalyzed double cyclization to build up the tetracyclic core‐carbon skeleton, and a late installation of the C5‐bridgehead methyl group via proton‐induced cyclopropane opening associated with spontaneous cyclic ether formation. The obtained pentacyclic compound (corresponding to an anhydride of the originally suggested structure for dysiherbol A) showed identical spectroscopic data as the natural product, but an opposite molecular rotation. CD‐spectroscopic measurements finally confirmed that both the constitution and the absolute configuration of the originally proposed structure of (+)‐dysiherbol A need to be revised. John Wiley and Sons Inc. 2021-06-01 2021-06-25 /pmc/articles/PMC8251742/ /pubmed/33978302 http://dx.doi.org/10.1002/anie.202105733 Text en © 2021 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
spellingShingle | Communications Baars, Julian Grimm, Isabelle Blunk, Dirk Neudörfl, Jörg‐Martin Schmalz, Hans‐Günther Enantioselective Total Synthesis and Structural Revision of Dysiherbol A |
title | Enantioselective Total Synthesis and Structural Revision of Dysiherbol A |
title_full | Enantioselective Total Synthesis and Structural Revision of Dysiherbol A |
title_fullStr | Enantioselective Total Synthesis and Structural Revision of Dysiherbol A |
title_full_unstemmed | Enantioselective Total Synthesis and Structural Revision of Dysiherbol A |
title_short | Enantioselective Total Synthesis and Structural Revision of Dysiherbol A |
title_sort | enantioselective total synthesis and structural revision of dysiherbol a |
topic | Communications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8251742/ https://www.ncbi.nlm.nih.gov/pubmed/33978302 http://dx.doi.org/10.1002/anie.202105733 |
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