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Formal Total Syntheses of (-)- and (+)-Actinophyllic Acid.

The formal total syntheses of (-)-actinophyllic acid and its enantiomer starting from the same chiral intermediate are reported. The synthesis features a photoredox organocatalytic asymmetric alkylation to generate the original C15 chirality, a photocatalytic C-H functionalization of 3-methylindole in flow for constructing the C16 all-carbon quaternary center, a regioselective 1,3-dipolar cycloaddition, and an intramolecular Henry reaction to assemble the pentacyclic core of the target molecule.