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-(
氨基
甲基)-5-
甲基己
酰胺(29),以及它们的制备方法。本发明还涵盖了将新型普雷巴林
中间体转化为普雷巴林(式(I))的方法。本发明进一步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,并将它们回收利用,从而增加了最终产物的产率,大大降低了生产成本。