An Immobilization Method of Chiral Quaternary Ammonium Salts onto Polymer Supports

摘要

Asymmetric transformations by means of a chiral quaternary ammonium salt acting as the organocatalyst have been extensively studied. Since the pioneering work by a research group at Merck in 1984, cinchona-alkaloid-derived quaternary ammonium salts have been widely used as chiral organocatalyst in various asymmetric reactions.