Firouzabadi, H., Iranpoor, N., & Farahi, S. "Solid Trichlorotitanium (IV) Tri uoromethanesulfonate TiCl3 (OTf) Catalyzed Highly Ecient Protection of Aldeyhydes as their Acylals at Room Temperature under Solvent-Free Conditions" .e2926 , Scientia Iranica, 15, 4, 2008, e2926.