Visible Light‐Mediated Synthesis of (Spiro)anellated Furans

Zusammenfassung

Visible light-mediated decarboxylation using N-acyloxyphthalimides as the source for carbon-centered radicals was applied for the synthesis of spirobutenolides. The utility of this approach is demonstrated with the formal synthesis of (S)-(+)-lycoperdic acid. Alternatively, 2,3-anellated furans can be obtained in a one-pot procedure via photocyclization following a regioselective semipinacol rearrangement.