New Catalytic Activity of Polymer-Supported Quaternary Onium Salts. Regioselective Addition Reaction of Oxiranes with Active Esters Catalyzed by Insoluble Polystyrene-Bound Quaternary Ammonium and Phosphonium Salts
A new regioselective addition reaction of oxiranes 15-17 with active esters 18 and 19 was carried out to give the adducts 20a-f using quaternary onium salts on cross-linked polystyrene beads.The catalytic activity of the polystyrene beads was evalulated f