Ambruticins: Tetrahydropyran Ring Formation and Total Synthesis

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

The ambruticins are a family of polyketide natural products which exhibit potent antifungal activity. Gene knockout experiments are in accord with the proposal that the tetrahydropyran ring of the ambruticins is formed via the AmbJ catalysed epoxidation of the unsaturated 3,5-dihydroxy acid, ambruticin J, followed by regioselective cyclisation to ambruticin F. Herein, a convergent approach to the total synthesis of ambruticin J is described as well as model studies involving epoxidation and cyclisations of unsaturated hydroxy esters to give tetrahydropyrans and tetrahydrofurans. The total synthesis involves preparation of three key fragments which were united via a Suzuki-Miyaura cross-coupling and Julia-Kocienski olefination to generate the required carbon framework. Global deprotection to a triol and selective oxidation of the primary alcohol gave, after hydrolysis of the lactone, ambruticin J.
Original languageEnglish
Pages (from-to)6210-6215
Number of pages6
JournalOrganic and Biomolecular Chemistry
Volume19
Issue number28
DOIs
Publication statusPublished - 28 Jun 2021

Bibliographical note

Funding Information:
We thank the Bristol Chemical Synthesis Centre for Doctoral Training, funded by EPSRC (EP/G036764/1), and the University of Bristol, for a PhD studentship to JIB.

Publisher Copyright:
© The Royal Society of Chemistry 2021.

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