Acylating poly- or oligo- saccharide comprises dissolving the saccharide in an ionic liquid, treating the mixture with an acid under the supplement of water, and treating the obtained saccharide with an acylating agent

摘要

Acylating poly- or oligo- saccharide comprises dissolving poly- or oligo- saccharide in at least an ionic liquid (A), treating the mixture with at least an acid under the supplement of water at high temperature, and treating the obtained poly- or oligo- saccharide having polymerization degree lower than the used poly- or oligo- saccharides, with an acylating agent.