Application of p-toluenesulfonic Acid (PTSA) in Organic Synthesis

p-toluenesulfonic acid has been used in many organic preparations as a good solid catalyst. In this review, we wish to report some applications of this catalyst in organic reactions. Keywords: p-toluenesulfonic acid, Heterogenous Catalysis, organic reactions, Beckmann Rearrangement, zeolites, heteropoly acids, Friedel-Crafts reactions, esterification, Synthesis of B-indolylketones, B-indolylketones, Nazarov Cyclizations, Halogenation of Ketones, Nitration of Phenols