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A Divergent Asymmetric Total Synthesis of Coprophilin and Four Trichodermic Acids via a [1,5]-Hydride Shift-Aldol
Edward Smith1, Timothy C Jenkins1, Charles S Yeung2
1Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K.
Abstract:
The asymmetric syntheses of coprophilin and four members of the trichodermic acid family of natural products are disclosed. Our work employs a number of key transformations, including an aluminum-promoted [1,5]-hydride shift-aldol cascade reaction, an exo-selective Diels-Alder cycloaddition, and a late-stage Fleming-Tamao oxidation. These key steps efficiently construct the bicyclic core of the natural products, which can then be readily functionalized in a divergent manner, allowing the synthesis of a wide range of natural product targets.
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