Dual behaviour of sepiolites as single electron acceptors or Lewis acids: Reactivity of two α-acetoxystyrenes adsorbed on a iron(III)-exchanged sepiolite

Iron(III)‐exchanged sepiolites exhibit dual behaviour as catalysts in the reactions of α‐acetoxystyrenes 1a,b ; operating as Lewis acids (to give 2–5 ) in thermolysis reactions under reduced pressure or as single‐electron acceptors (to give 7) in photolysis under aerobic conditions.