| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for preparing an amino acid N-carboxylic anhydride which is capable to conduct by an easy treating operation, and a method for preparing a polyamino acid by easy treating operation. SOLUTION: The method for preparing the amino acid N-carboxylic anhydride is characterized by reacting anα-amino acid with di-tert-butyl tricarbonate. Further, the method for preparing the polyamino acid is characterized by decarbonating the amino acid N-carboxylic anhydride obtained by reacting theα-amino acid with di-tert-butyl tricarbonate.
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