We report a stereodivergent photooxidative synthesis of the 3,4-seco-dammarane triterpenoids cyclocariols A, B, and E from the commercially available ginsenoside Rg1. This study features a visible-light-induced β-fragmentation/elimination cascade reaction that constructs the seco-dammarane core, and a Schenck ene reaction that installs oxidative numbers at C24 and C25.
J. Yuan, S. Fu and B. Liu, Org. Biomol. Chem., 2025, Accepted Manuscript , DOI: 10.1039/D6OB00346J
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