For the synthesis of oxytocin (Ia) analogues modified in the carboxyterminal part of the molecule, a method based on the condensation of protected aminoterminal hexapeptide with tripeptides by the action of dicyclohexylcarbodiimide and pentafluorophenol in the presence of 1-hydroxybenzotriazole was devised. Using this method [7-[U-13C]proline]oxytocin (Ib), des-9-glycine-oxytocin (Ic) and methyl ester of oxytocinoic acid ([9-glycine methyl ester]oxytocin) (Id) were prepared.
对于氧
催产素(
Ia)分子的羧基端部分进行修饰的合成,设计了一种基于受保护的
氨基端六肽与三肽通过二环己基碳二
亚胺和
五氟苯酚在
1-羟基苯并三唑存在下的缩合反应的方法。使用这种方法制备了[7-[U-
13C]脯
氨酸]氧
催产素(
Ib)、去九甘
氨酸氧
催产素(
Ic)和氧催产酸甲酯([9-甘
氨酸甲酯]氧
催产素)(
Id)。