An object of the present invention is to provide a method for synthesizing a peptide thioester by using a compound that can be easily obtained within a relatively short time under conditions in which a side reaction is unlikely to occur. In the present invention, a thioester bond is formed by elongating a pepetide chain using N-alkyl cysteine as the C-terminal amino acid according to the Fmoc method, carrying out deprotection, and then causing the peptide bond to undergo N-S transfer to the thiol group of N-alkyl cysteine under weak acidic conditions.
本发明的目的是提供一种合成肽
硫酯的方法,使用一种在较短时间内,在不太可能发生副反应的条件下容易获得的化合物。在本发明中,
硫酯键的形成是根据 Fmoc 法,以 N-烷基半胱
氨酸作为 C 端
氨基酸,拉长肽链,进行脱保护,然后使肽键在弱酸性条件下与 N-烷基半胱
氨酸的
硫醇基发生 N-S 转移。