The present invention provides a method for producing a peptide, characterized in that it comprises converting an —SH group of a peptide comprising an amino acid residue having the —SH group to an —OH group, wherein said method comprises the following steps (a) to (c): (a) allowing an —SH group in a peptide to react with a methylating agent to convert the —SH group to an —SMe group; (b) allowing the —SMe group obtained in the step (a) to react with a cyanizing agent to produce a reaction intermediate; and (c) converting the reaction intermediate obtained in the step (b) to a peptide comprising an amino acid residue having an —OH group under more basic conditions than the conditions in the step (b).
本发明提供了一种制备肽的方法,其特征在于包括将具有—SH基的
氨基酸残基的肽的—SH基转换为—OH基,其中所述方法包括以下步骤(a)至(c):(a)使肽中的—SH基与甲基化剂反应,将—SH基转换为—SMe基;(b)使步骤(a)中获得的—SMe基与
氰化剂反应,生成反应中间体;以及(c)在比步骤(b)中的条件更为碱性的条件下将步骤(b)中获得的反应中间体转化为具有—OH基的
氨基酸残基的肽。