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Biomimetic Synthesis of Chejuenolides A–C by a Cryptic Lactone-Based Macrocyclization: Stereochemical Implications in Biosynthesis
[Image: see text] A hypothetical Mannich macrocyclization in the biosynthesis of chejuenolides A–C served as the basis for the synthetic design herein. Using a lactone-based linear precursor constructed via a tactic sequence of aldol–Julia–aldol reactions on a gram scale, the biomimetic total synthe...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9881209/ https://www.ncbi.nlm.nih.gov/pubmed/36712486 http://dx.doi.org/10.1021/acscentsci.2c01096 |
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author | Zhang, Bingbing Zheng, Kuan Hong, Ran |
author_facet | Zhang, Bingbing Zheng, Kuan Hong, Ran |
author_sort | Zhang, Bingbing |
collection | PubMed |
description | [Image: see text] A hypothetical Mannich macrocyclization in the biosynthesis of chejuenolides A–C served as the basis for the synthetic design herein. Using a lactone-based linear precursor constructed via a tactic sequence of aldol–Julia–aldol reactions on a gram scale, the biomimetic total synthesis and structural validation of chejuenolides A–C were successfully achieved for the first time. The β-oxo-δ-lactone unit in the macrocyclized adducts was fragile and readily converted to a series of C2/C18-diastereoisomers via a decarboxylation and protonation pathway. Stereochemical identification of the biosynthetic precursor (O3P2) confirmed structural adherence to the given macrocycles and previously clarified lankacidins. Moreover, the stereovariants of the linear precursor designed for the macrocyclization event highlighted the unparalleled impact of using this biomimetic approach to determine the stereoselectivity in the proposed enzymatic reaction by reviving the lost or unstable intermediate. |
format | Online Article Text |
id | pubmed-9881209 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-98812092023-01-28 Biomimetic Synthesis of Chejuenolides A–C by a Cryptic Lactone-Based Macrocyclization: Stereochemical Implications in Biosynthesis Zhang, Bingbing Zheng, Kuan Hong, Ran ACS Cent Sci [Image: see text] A hypothetical Mannich macrocyclization in the biosynthesis of chejuenolides A–C served as the basis for the synthetic design herein. Using a lactone-based linear precursor constructed via a tactic sequence of aldol–Julia–aldol reactions on a gram scale, the biomimetic total synthesis and structural validation of chejuenolides A–C were successfully achieved for the first time. The β-oxo-δ-lactone unit in the macrocyclized adducts was fragile and readily converted to a series of C2/C18-diastereoisomers via a decarboxylation and protonation pathway. Stereochemical identification of the biosynthetic precursor (O3P2) confirmed structural adherence to the given macrocycles and previously clarified lankacidins. Moreover, the stereovariants of the linear precursor designed for the macrocyclization event highlighted the unparalleled impact of using this biomimetic approach to determine the stereoselectivity in the proposed enzymatic reaction by reviving the lost or unstable intermediate. American Chemical Society 2023-01-04 /pmc/articles/PMC9881209/ /pubmed/36712486 http://dx.doi.org/10.1021/acscentsci.2c01096 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Zhang, Bingbing Zheng, Kuan Hong, Ran Biomimetic Synthesis of Chejuenolides A–C by a Cryptic Lactone-Based Macrocyclization: Stereochemical Implications in Biosynthesis |
title | Biomimetic Synthesis
of Chejuenolides A–C by
a Cryptic Lactone-Based Macrocyclization: Stereochemical Implications
in Biosynthesis |
title_full | Biomimetic Synthesis
of Chejuenolides A–C by
a Cryptic Lactone-Based Macrocyclization: Stereochemical Implications
in Biosynthesis |
title_fullStr | Biomimetic Synthesis
of Chejuenolides A–C by
a Cryptic Lactone-Based Macrocyclization: Stereochemical Implications
in Biosynthesis |
title_full_unstemmed | Biomimetic Synthesis
of Chejuenolides A–C by
a Cryptic Lactone-Based Macrocyclization: Stereochemical Implications
in Biosynthesis |
title_short | Biomimetic Synthesis
of Chejuenolides A–C by
a Cryptic Lactone-Based Macrocyclization: Stereochemical Implications
in Biosynthesis |
title_sort | biomimetic synthesis
of chejuenolides a–c by
a cryptic lactone-based macrocyclization: stereochemical implications
in biosynthesis |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9881209/ https://www.ncbi.nlm.nih.gov/pubmed/36712486 http://dx.doi.org/10.1021/acscentsci.2c01096 |
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