We successfully developed (1) scalable synthesis of the triol segment and (2) regio- and stereoselective synthesis of the tetracyclic skeleton by tandem spiroacetal/pyran formation from a simpler alkyne precursor, resulting in the achievement of concise total synthesis of (−)-berkelic acid.
S. Hanada, M. Yoshida and H. Kigoshi, Chem. Commun., 2024, 60, 3331 DOI: 10.1039/D4CC00166D
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