摘要 |
Amino acid salt having at least one unblocked amino group and comprising at least one cation which has a nitrogen cationic atom is reacted with 1-(tertiary-alkoxycarbonyl)imidazole in the liquid phase and in the presence of essentially inert organic solvent having a dielectric constant at 25 DEG C. of at least about 4, to produce N-(tertiary-alkoxycarbonyl)-blocked amino acid salt.
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