synthetic route that delivered several kilograms of the drug substance. The synthesis included diacylation of commercially available 3,4-diaminopyridine 1 with diethyl oxalate to give 2 and chlorination with POCl3 to give pyrido[3,4-b]pyrazine 3, followed by two sequential nucleophilic aromatic substitutions. A final hydrogenation and acetylation of intermediate 7 provided CVN424. Overall, a safe and
CVN424 是一种候选药物,正在临床试验中对其进行研究,以治疗与帕
金森病相关的运动波动。我们在此描述了一种有效合成路线的工艺开发,该路线可提供数公斤的
原料药。合成包括将市售的 3,4-二
氨基吡啶1用
草酸二乙酯进行二酰基化,得到2,然后用 POCl 3
氯化,得到
吡啶并 [3,4- b ]
吡嗪3,然后进行两个连续的亲核芳族取代。中间体7的最终氢化和乙酰化提供了 CVN424。总的来说,开发了一种安全可靠的合成方法,它分五个线性步骤进行,总产率为 15%。