Immobilization of Chiral Organocatalyst onto Polymer through Ionic Bonding

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Ionically polymer-supported chiral organ catalyst was successfully prepared by the ion exchange reaction of a sulfonated polymer and a chiral organ catalyst. The methodology is one of the efficient immobilization methods because chiral organ catalyst with ammonium, amine, or iminium salt can be immobilized onto polymer rapidly and quantitatively. The catalytic activity of ionically polymer-supported chiral organ catalyst in asymmetric reactions was found to be equal or superior to that of model chiral catalyst.