W. Henderson et al., IMMOBILIZED PHOSPHINES INCORPORATING THE CHIRAL BIOPOLYMERS CHITOSAN AND CHITIN, Journal of the Chemical Society, Chemical Communications, (16), 1994, pp. 1863-1864
Reaction of chitosan with hydroxymethyl phosphines R(2)PCH(2)OH procee
ds readily via a Mannich-type condensation reaction with the polymer N
H2 groups to give a new type of chiral, immobilised phosphine.