The present invention relates to a preparation method of a long-chain compound, which includes the following steps: (1) carrying out condensation reaction on H—R
2
and R
5
N-Glu(OR
4
)—OR
3
, wherein, R
3
is a carboxyl protecting group, R
4
is a carboxyl activating group, and R
5
is an amino protecting group; obtaining a compound of formula II; (2) removing carboxyl protecting group R
3
and amino protecting group R
5
of the compound shown in formula II to obtain a compound of formula III; (3) carrying out condensation reaction on the compound shown in formula III and
to obtain a compound shown in formula I. The method reduces the time of deprotection, and all the reactions can be carried out in a solvent with low boiling point. The post-processing requires only simple washing and recrystallization to obtain the product with higher purity, so the method is suitable for large-scale production.
本发明涉及一种长链化合物的制备方法,包括以下步骤:(1) 对H—R2和R5N-Glu(OR4)—OR3进行缩合反应,其中,R3是羧基保护基,R4是羧基活化基,R5是
氨基保护基;获得化合物II的化合物;(2) 去除化合物II中的羧基保护基R3和
氨基保护基R5,得到化合物III的化合物;(3) 对化合物III进行缩合反应以获得化合物I的化合物。该方法减少了脱保护的时间,并且所有反应均可在沸点较低的溶剂中进行。后处理只需要简单的洗涤和重结晶即可获得较高纯度的产品,因此该方法适用于大规模生产。