An optimized synthetic method in high efficiency has been developed for the synthesis of lixivaptan from 2‐nitrobenzyl bromide and pyrrole‐2‐carboxaldehyde. The byproducts among this procedure and an unknown impurity in crude product were investigated. The byproducts were speculated by 1H NMR or MS. The unknown impurity was characterized by 1H NMR, 13C NMR, and HRMS, confirming the structures as N
已开发出一种优化的高效合成方法,用于从2-硝基苄基
溴和
吡咯-2-甲醛中合成立西伐坦。研究了该程序中的副产物和粗产物中的未知杂质。副产物通过1 H NMR或MS推测。未知杂质的特征在于1 H NMR,13 C NMR和HRMS,确认结构为N- [3-
氯-4-(5 H-
吡咯并[2,1- c ] [1,4]苯并二氮杂-10 (11 H)-基羰基)苯基] -N-(5-
氟-2-甲基苯甲酰基)-5-
氟-2-甲基苯甲酰胺。之后,合成杂质以进行比较。获得目标产物立克伐普坦,总产率为47.6%,纯度为99.93%。这种经济高效且环保的工艺适用于规模化生产。