A process for obtaining therapeutically active 2-[4-(3- and 2-(flurobenzyloxy)benzylamino]propanamides, and their salts with pharmaceutically acceptable acids with high purity degree, in particular, with a content of dibenzyl derivatives impurities lower than 0.03%, preferably lower than 0.01% by weight. The process is carried out by submitting the Schiff bases intermediates 2- [4 -(3- and 2-fluorobenzyloxy)benzylideneamino]propanamides to a reduction reaction with a reducing agent selected from sodium borohydride and potassium borohydride in an appropriate amount of an organic solvent selected from C1-C5 lower alkanols, allowing the formation and presence during a substantial position of the reduction reaction course of a suspension of the Schiff base into the saturated solution of the Schiff base into the same organic solvent.
一种用于获得具有高纯度度的治疗活性2-[4-(3-和2-(
氟苄氧基)苄基
氨基]丙酰胺及其与药学上可接受的酸盐,特别是含二苄衍
生物杂质低于0.03%,最好低于0.01%重量的方法。该过程通过将席夫碱中间体2-[4-(3-和2-
氟苄氧基)苄
亚胺]丙酰胺提交给还原剂(选择自
硼氢化钠和
硼氢化钾)的还原反应,在选择自C1-C5低级烷醇的有机溶剂中以适量进行,允许在还原反应过程中的实质位置形成和存在席夫碱的悬浮物,使其转变为席夫碱在相同有机溶剂中的饱和溶液。