The present invention encompasses novel intermediates of pregabalin, namely 3-cyano-5-methyl hexanamide (28) and 3-(amino methyl)-5 methyl hexanamide (29), and processes for their preparation. The invention also encompasses a process for converting the novel pregabalin intermediates into pregabalin, Formula (I): The present invention further provides a cost effective method for the synthesis of (S)-pregabalin, which involves the recovery of mandelic acid and tartaric acid used in the resolution process and recycling them, increasing the yields of the final product formed, which substantially reduced the cost of the production.
本发明涵盖了普雷巴林的新型中间体,即3-
氰基-5-甲基己酰胺(28)和3-(
氨甲基)-5-甲基己酰胺(29)以及其制备方法。本发明还涵盖了将新型普雷巴林中间体转化为普雷巴林的方法,公式(I):本发明还提供了一种成本效益高的(S)-普雷巴林合成方法,其中包括回收用于分离过程的
苯乙酸和
酒石酸并将它们循环利用,提高了最终产物的收率,从而大大降低了生产成本。