The deprotection of aromatic as well as conjugated acetals and ketals in water is catalyzed by iron(III) tosylate (1.0–5.0 mol %). Iron(III) tosylate is an inexpensive and readily available catalyst. The use of water, the most environmentally benign solvent, makes this procedure especially attractive for acetal deprotection.
Mohan, Ram; Olson, Margaret; Carolan, James; Chiodo, Michael; and Lazzara, Phillip, "Iron(III) Tosylate-Catalyzed Deprotection of Aromatic Acetals in Water" (2010). Scholarship. 27.