Application of polymer-bound thiazolium salts to the synthesis of acyloins and benzoins: Effects of solvent and substituents of the thiazolium nucleus

Covalent immobilization of the thiazole nucleus on a chloromethylated polystyrene copolymer results in the formation of a catalytically active thiazolium salt, capable of repeated acyloin and benzoin condensations. The nature of the solvent and the substituents on the thiazolium nucleus has been found to have marked effects of the rate of catalysis.