Pyronaridine tetraphosphate (1) is a well-known antimalarial drug. However, it required a carefully optimized production process for the manufacture of pyronaridine tetraphosphate. Each step of its manufacturing process was reinvestigated. For the cyclization of 4-chloro-2-(6-methoxy-pyridin-3-yl-amino)-benzoic acid 6 to 7,10-dichloro-2-methoxybenzo[b]-1,5-naphthyridine 5, an improved process was developed to eliminated critical process impurity (BIA). By the redesign of the formation of triphosphate salt, the purity as API grade was increased. Thus, a robust manufacturing process with an acceptable process performance has been developed to produce high quality pyronaridine tetraphosphate.
四
次磷酸吡咯烷酮(1)是一种著名的
抗疟药物。然而,生产
四磷酸吡咯烷酮需要经过精心优化的生产工艺。我们对其生产过程的每个步骤都进行了重新研究。在将 4-
氯-2-(6-甲氧基
吡啶-3-基
氨基)-
苯甲酸 6 环化为
7,10-二氯-2-甲氧基苯并[b]-1,5-萘啶 5 的过程中,开发了一种改进的工艺,以消除关键工艺杂质(BIA)。通过重新设计
三磷酸盐的形成过程,提高了
原料药等级的纯度。因此,我们开发出了一种稳健的生产工艺,其工艺性能可以接受,可以生产出高质量的
四磷酸吡萘啶。