A novel synthesis method of Glyco-drug radiotracer precursor is revealed. After completing synthesis of Z-Gly-ah (main structure), galactosamine GalNAc(OAc)
4
is added to have coupling reaction. Then a product is separated directly from dichloromethane. Thus loss of galactosamine during extraction with liquid chromatography is reduced. Moreover, instead of trifluoroacetyl group, carbobenzoxy (abbreviated as Cbz or Z) is used as a protecting group to ensure uniformity of the phase. The cost and synthesis time are also dramatically reduced.
揭示了一种新的糖基药物放射性示踪剂前体的合成方法。完成主要结构Z-Gly-ah的合成后,加入甘露胺GalNAc(OAc)4进行偶联反应。然后直接从
二氯甲烷中分离产物。因此,
液相色谱提取过程中甘露胺的损失得到了减少。此外,保护基使用碳苯氧基(简称Cbz或Z)以确保相位的一致性,而不是三
氟乙酰基。成本和合成时间也大大降低。