Solid Trichlorotitanium (IV) Trifluoromethanesulfonate TicL3 (OTf) Catalyzed Highly Efficient Protection of Aldeyhydes as their Acylals at Room Temperature under Solvent-Free Conditions

TiCI3(OTf) catalyzed efficiently the protection of aromatic aldehydes with acetic anhydride in the absence of solvent at room temperature with excellent yields. By this method, aliphatic aldehydes were also converted to their corresponding acylals, in the presence of a mixture of acetic anhydride and acetic acid at high yields