Development of Asymmetric Polymer Catalysts Based on Controlled Helical Structure

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In this project, we have developed optically active helical polymers containing organocatalytic units as the pendant or main chain, and investigated their asymmetric organocatalysis and chiral recognition ability with the anticipation that the one-handed helical conformation would enhance the enantioselectivity and chiral recognition ability as compared to those of the corresponding random polymers and monomers. We have successfully synthesized a series of optically active helical polymers consisting of naturally-occurring riboflavin (vitamin B2) and cinchona alkaloid derivatives that function as asymmetric catalysts, chiral stationary phases for HPLC, and chiral sensory materials.