The present invention relates to a method for preparing pregabalin ((S)-3-(aminomethyl)-5-methylhexanoic acid which is useful for the prevention and treatment of seizure disorders, pins, and psychiatric disorders. According to the present invention, pregabalin can be prepared in a high enantiomeric excess of 99% or more, without an additional step of separating or purifying its enantiomer.
Herein we describe a novel lactamization-decarboxylation tandem reaction to form (S)-N-benzyl-pregabalin lactam in solvent-free condensation of benzyl amine with (S)-4-isobutyl α-ethylaceto γ–butyrolactone, obtained in two steps from commercially available starting material. Triflic acid-mediated debenzylation in the same pot gave (S)-pregabalin lactam, which constitutes a formal synthesis of the anticonvulsant
在此,我们描述了一种新的内酰胺化-脱羧串联反应,在苄胺与 ( S )-4-异丁基 α-乙基乙酰基 γ-丁内酯的无溶剂缩合反应中形成 ( S ) -N-苄基-普瑞巴林内酰胺,该反应分两步从可商购的起始材料。在同一锅中三氟甲磺酸介导的去苄基化产生 ( S )-普瑞巴林内酰胺,它构成了抗惊厥和抗焦虑药物普瑞巴林的正式合成。内酰胺化中间体的分离表明,最初形成的动力学羟基酰胺与内酯处于平衡状态,并且氨基酸的形成先于内酰胺化。
[EN] NOVEL METHOD FOR PREPARING PREGABALIN<br/>[FR] NOUVEAU PROCÉDÉ DE PRÉPARATION DE PREGABALINE