Novel N-unsaturated fatty acyl and N-trimethylacetyl derivatives of chitosan
1995
Zhang, M. | Hirano, S.
Novel N-oleoyl (d.s. 0.93), N-linolenoyl (d.s. 0.93), N-elaidoyl (d.s. 0.88), N-erucoyl (d.s. 0.87) and seven N-trimethylacetyl (d.s. 0.16-0.85) derivatives of chitosan were isolated in 54-91% yields as a gel or a precipitate from the corresponding carboxylic anhydride. These derivatives were insoluble in common organic solvents, except for partially N-trimethylacetyl derivatives (d.s. 0.30-0.54) which were soluble in water. N-Trimethylacetyl derivative (d.s. 0.65) was isolated in 83% yield, and was insoluble in water. Their chemical structures were determined with reference to the corresponding crystalline derivatives of D-glucosamine.
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