Preparation of n-protected alpha-l-aspartyl-l-phenylalanine methyl ester
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0334236A2
公开(公告)日:1989-09-27
Disclosed are a process for preparing N-protected aspartic anhydride by the reaction of N-protected aspartic acid with phosgene, a process for preparing an N-protected α-L-aspartyl-L-phenylalanine methyl ester from N-protected aspartic anhydride and mineral acid salt of L-phenylalanine methyl ester, and a process for preparing N-benzyloxycarbonyl-L-aspartic anhydride by the reaction of N-benzyloxycarbonyl-L-aspartic acid with acetic anhydride.