A novel process for the synthesis of Lacosamide using D,L-serine as starting material is described, where the methylation reaction of hydroxyl is carried out using an inexpensive base such as NaOH and an inexpensive alkylating agent, non-toxic and non-carcinogenic, such as methyl p-toluenesulfonate; the R enantiomer is isolated from the racemic mixture of Lacosamide after selective hydrolysis of the acetamide, salification of the racemic mixture with a chiral acid (HX*) in an organic solvent, resolution of the diastereoisomeric mixture, preferably by precipitation of the R enantiomer, and subsequent acetylation of the optically pure intermediate.
本文描述了一种使用D,
L-丝氨酸作为起始物质合成Lacosamide的新工艺,其中羟基的甲基化反应使用廉价碱(如NaOH)和廉价烷基化试剂(如
对甲苯磺酸甲酯)进行,后者是无毒且非致癌的;在通过酰胺的选择性
水解和在有机溶剂中使用手性酸(HX*)盐化混合物后,通过对映异构体混合物的分离,首选通过沉淀R对映体来分离Lacosamide的R对映体,然后对光学纯中间体进行乙酰化处理。