%0 Journal Article %T Synthesis of Main-Chain Chiral Quaternary Ammonium Polymers for Asymmetric Catalysis Using Quaternization Polymerization %A Naoki Haraguchi %A Parbhej Ahamed %A Md. Masud Parvez %A Shinichi Itsuno %J Molecules %D 2012 %I MDPI AG %R 10.3390/molecules17067569 %X Main-chain chiral quaternary ammonium polymers were successfully synthesized by the quaternization polymerization of cinchonidine dimer with dihalides. The polymerization occurred smoothly under optimized conditions to give novel type of main-chain chiral quaternary ammonium polymers. The catalytic activity of the polymeric chiral organocatalysts was investigated on the asymmetric benzylation of N-(diphenylmethylidene)glycine tert-butyl ester. %K chiral polymer %K quaternization polymerization %K organocatalysis %K cinchona alkaloid %K quaternary ammonium salt %U http://www.mdpi.com/1420-3049/17/6/7569