The present invention has an object of providing a peptide synthesis method using a carrier capable of reversibly repeating the dissolved state and the insolubilized state, wherein the problem of an amino acid active species existing in the reaction system in de-protection reaction can be easily solved. The present invention provides a peptide synthesis method comprising the following steps: a step of condensing an N-Fmoc protected amino acid with a peptide having a C-terminal protected with a carrier which is crystallized according to a change of a composition of a dissolving solvent, in the presence of a condensing agent, to obtain an N-Fmoc-C-carrier protected peptide, a step of adding an alkylamine having 1 to 14 carbon atoms or hydroxyl amine to the reaction system, a step of de-protecting the N-terminal, and a step of changing the composition of the solvent dissolving the C-carrier protected peptide, to crystallize and separate the peptide.
本发明的目的是提供一种肽合成方法,使用能够可逆地重复溶解状态和不溶解状态的载体,从而可以轻松解决去保护反应中存在的
氨基酸活性物种的问题。本发明提供一种肽合成方法,包括以下步骤:将N-Fmoc保护的
氨基酸与具有C末端保护的肽在存在
缩合剂的情况下与根据溶解溶剂的组成变化结晶的载体进行缩合,以获得N-Fmoc-C-载体保护的肽,向反应体系中加入具有1至14个碳原子的烷基胺或
羟胺,去保护N末端,改变溶解C-载体保护的肽的溶剂组成的步骤,结晶并分离肽。