Highly Efficient Heterogeneous Acetalization of Carbonyl Compounds Catalyzed by a Titanium Cation-Exchanged Montmorillonite.

Abstract The titanium cation-exchanged montmorillonite efficiently catalyzed the selective acetalization of various carbonyl compounds as a recyclable solid acid. This heterogeneous catalyst has an advantage of a strikingly simple workup procedure over conventional homogeneous acids.