Synthesis, characterization and antifungal properties of N,O-(acyl)-N-(trimethyl) chitosan chloride

Abstract

Three novel water soluble chitosan derivatives: N,O-(acetyl)-N-(trimethyl) chitosan chloride (ATMCS), N,O-(benzoyl)-N-(trimethyl) chitosan chloride (BTMCS), N,O-(chloracetyl)-N-(trimethyl) chitosan chloride (CATMCS) were successfully synthesized. All the derivatives were soluble in water at pH 7. The antifungal properties of the derivatives against two plant fungus Gloeosporium theae-sinensis (G. theae-sinensis) and Phomopsis asparagi (P. asparagi) were studied. The results indicated that the antifungal activities of ATMCS, BTMCS and CATMCS enhanced compared with that of N-(trimethyl) chitosan chloride (TMCS). Against G. theae-sinensis and P. asparagi, BTMCS and CATMCS exhibited much better activities than ATMCS which was may be due to the phenyl and chlorine respectively. Generally speaking, acyl modification of TMCS was effective.