| 主权项 |
1. A method for production of an N-carboxy amino acid anhydride, comprising reacting an amino acid organic salt compound with a carbonic acid diester,
wherein the amino acid organic salt compound is represented by formula (1): wherein AX+ represents an organic onium ion and Y represents an optionally substituted divalent hydrocarbon group, and wherein the carbonic acid diester is a compound represented by formula (2): wherein R4 and R5 each independently represent an aryl group which may have substituent(s), wherein the substituent(s) are selected from the group consisting of a nitro group, halogen atoms, a perfluoroalkyl group, a perchloroalkyl group, an ester group, an acetyl group, a cyano group and a benzoyl group.
|
