improved synthesis of Lacosamide 1 with high purity has been developed. Critical parameters of each step were identified as well as the impurities generated. Moreover, a creative method to improve chiral purity and stability of the key intermediate (R)-2-amino-N-benzyl-3-methoxypropionamide 10 by forming salt with an achiral acid (phosphoric acid) was discovered to ensure the chiral purity of (R)-Lacosamide
[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF LACOSAMIDE<br/>[FR] PROCÉDÉ AMÉLIORÉ DE PRÉPARATION DE LACOSAMIDE
申请人:UNICHEM LAB LTD
公开号:WO2018060781A1
公开(公告)日:2018-04-05
The present invention relates to an improved process for the synthesis of (R)- Lacosamide in which free base of O-methyl-N-benzyl-D-Serinamide is not isolated before acylation. The process avoids the use of column chromatography and chiral resolution for the preparation of different stages of Lacosamide.