申请人:Chunghwa Chemical Synthesis & Biotech Co. Ltd.
公开号:US20190100554A1
公开(公告)日:2019-04-04
The present invention provides a method for synthesizing etelcalcetide or salts thereof, comprising the steps of: (a) synthesizing the D-amino acids in the formula (I) sequentially by Fmoc solid-phase synthesis, using a solid support as a starting material in solid phase peptide synthesis and sequentially synthesizing a D-form amino acid of formula (I) by Fmoc chemistry; deprotecting Fmoc group and acetylating the amino group to obtain a sequence A comprising protecting groups (PG) in the side chain of D-Cys and D-Arg; (b) removing the protecting group in the side-chain of D-Cys of the sequence A to form a sequence B; (c) disulfide formation at D-Cys of the sequence B by (PG)-L-Cys-OH to obtain a sequence C; (d) using a cleavage solution to remove the protecting groups of the sequence C to give etelcalcetide as formula (I). The present invention can shorten the steps and time for preparing Etelcalcetide.
本发明提供了一种合成Etelcalcetide或其盐的方法,包括以下步骤:(a)通过Fmoc固相合成法逐步合成式(I)中的D-氨基酸,使用固相肽合成的固体支撑体作为起始材料,并通过Fmoc化学逐步合成式(I)的D-型氨基酸;去除Fmoc保护基并乙酰化氨基以获得一个包含保护基(PG)的序列A,其中D-Cys和D-Arg的侧链中含有保护基(PG);(b)去除序列A中D-Cys的侧链保护基以形成序列B;(c)通过(PG)-L-Cys-OH在序列B的D-Cys处进行二硫键形成,以获得序列C;(d)使用剪切溶液去除序列C的保护基,以得到式(I)的Etelcalcetide。本发明可以缩短制备Etelcalcetide的步骤和时间。