Polymer-supported aza-15-crown-5 as effective catalyst for phase-transfer reactions

Immobilized aza-15-crown-5 were prepared by the reaction of chloromethylated polystyrene resin with N-(2-hydroxyethyl)-aza-15-crown-5. These polymer-supported crowns were very effective catalysts of nucleophilic substitution reactions carried out under the conditions of the two-phase (L-S) or three-phase (L-S-L) catalysis.