Translation of a Polar Biogenesis Proposal into a Radical Synthetic Approach: Synthesis of Pleurocin A/Matsutakone and Pleurocin B

Translation of a Polar Biogenesis Proposal into a Radical Synthetic Approach: Synthesis of Pleurocin A/Matsutakone and Pleurocin B

A synthetic approach to recently reported and structurally unique 11(9→7)abeo-steroids pleurocin A/matsutakone (1) and pleurocin B (2) was developed by reconsidering the originally suggested polar transformations of their biogenesis. An intricate radical cyclization of a late stage intermediate foll...

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Veröffentlicht in:Journal of the American Chemical Society 2019-01, Vol.141 (3), p.1222-1226
Hauptverfasser: Heinze, Robert C, Heretsch, Philipp
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container_title Journal of the American Chemical Society
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Heretsch, Philipp
description A synthetic approach to recently reported and structurally unique 11(9→7)abeo-steroids pleurocin A/matsutakone (1) and pleurocin B (2) was developed by reconsidering the originally suggested polar transformations of their biogenesis. An intricate radical cyclization of a late stage intermediate followed by an oxidative quench was used instead and forged the abeo-framework, while the 9,11-seco-motif was obtained by conversion of ergosterol into a 9,11-secoenol ether employing a mercury-free desaturation of the Treibs type, an oxidative bond scission preluding a dioxa-[4+2]-cycloaddition of an aldehyde to an enone and a combined transacetalization/elimination followed by an ionic hydrogenation.
doi_str_mv 10.1021/jacs.8b13356
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title Translation of a Polar Biogenesis Proposal into a Radical Synthetic Approach: Synthesis of Pleurocin A/Matsutakone and Pleurocin B
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