Brønsted Acid Catalysis in Visible‐Light‐Induced [2 2] Photocycloaddition Reactions of Enone Dithianes

Angewchem
Brønsted Acid Catalysis in Visible‐Light‐Induced [2 2] Photocycloaddition Reactions of Enone Dithianes: 1,3‐Dithiane‐protected enones (enone dithianes) were found to undergo an intramolecular [2+2] photocycloaddition under visible‐light irradiation (λ=405 nm) in the presence of a Brønsted acid (7.5–10 mol %)....

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