Production of N-substituted chitin or chitosan, for hydrocolloid in cosmetics and pharmaceuticals, comprises reaction with carbonyl compound then catalytic hydrogenation

摘要

Production of N-substituted biopolymers (1) by reacting chitin and/or chitosan (2) with an aldehyde and/or ketone (3) then reducing the intermediate imine in presence of a heterogeneous transition metal catalyst (A).