Talajić G, Topić E, Meštrović J, Cindro N. Total Synthesis of Penicyclone A Using a Double Grignard Reaction.
J Org Chem 2022;
87:16054-16062. [PMID:
36383733 PMCID:
PMC9724088 DOI:
10.1021/acs.joc.2c02200]
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Abstract
We describe the first total synthesis of penicyclone A, a novel deep-sea fungus-derived polyketide, and a reevaluation of its antimicrobial activity. The synthesis of this unique spirolactone was achieved in 10 steps starting from a known d-ribose derivative. The key steps include a double Grignard reaction for the diastereoselective construction of the chiral tertiary alcohol intermediate, tandem oxidation/cyclization, and photooxygenation, followed by an oxidative rearrangement to introduce the enone functionality.
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