Reaction of chitosan with hydroxymethyl phosphines R2PCH2OH proceeds readily via a Mannich-type condensation reaction with the polymer NH2 groups to give a new type of chiral, immobilised phosphine.
W. Henderson, G. M. Olsen and L. S. Bonnington, J. Chem. Soc., Chem. Commun., 1994, 1863 DOI: 10.1039/C39940001863
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