| 摘要 |
PROBLEM TO BE SOLVED: To produce a chitosan derivative to which a substituent is introduced efficiently and which has improved abilities for optical resolution. SOLUTION: The chitosan derivative represented by general formula (I) is produced by deacetylating a raw material chitosan in a basic aqueous solution by heating treatment, and introducing a substituent to the deacetylated chitosan. (In the formula, R and Ra are each a substituent or the like including a 1-30C aliphatic hydrocarbon group or aromatic hydrocarbon group which may have a substituent, or Ra is a group forming pyridylimine or benzylimine with Rb; Rb is a hydrogen atom, a nitrogen atom of chitosan, or the like; and n is an integer of≥5). COPYRIGHT: (C)2008,JPO&INPIT |
