摘要 3-烷基-4-氧代-2-丁烯酸的酯类是非常重要的合成子,在 E 和 Z 构型中均不相同。(Z)-异构体可以很容易地从 3-烷基-4-羟基丁烯内酯获得,进而通过脂肪醛与乙醛酸的氨基烷基化来制备。相反,(E)-异构体来自费力的程序:醛与乙醛酸缩合,然后与γ-羟基丁烯内酯副产物分离并酯化,或醛烯胺与乙醛酸酯,然后Z酯通过-产物转化为γ-氨基丁烯内酯并纯化。在这里,我们描述了标题化合物的直接途径,应用于 (E)-3-丙基-4-氧代-2-丁烯酸甲酯,避免任何有问题的副产物或异构体色谱分离:戊醛和乙醛酸缩合为 3-丙基-4-羟基丁烯内酯,后者转化为 (Z)-3-丙基-4-氧代-2-丁烯酸甲酯,然后在酸性条件下异构化为 E 酯。图形概要
[EN] PROCESS FOR THE PREPARATION OF BRIVARACETAM<br/>[FR] PROCÉDÉ DE PRÉPARATION DE BRIVARACÉTAM
申请人:GLENMARK LIFE SCIENCES LTD
公开号:WO2021124066A1
公开(公告)日:2021-06-24
The present invention relates to a process for the preparation of brivaracetam, a compound of formula I and salts thereof. The present invention also relates to a compound of formula II and a compound of formula IIA, process for its preparation and conversion thereof to brivaracetam, the compound of formula I.
[EN] PROCESS FOR PREPARING BRIVARACETAM<br/>[FR] PROCÉDÉ DE PRÉPARATION DE BRIVARACÉTAM
申请人:UCB BIOPHARMA SPRL
公开号:WO2017076738A1
公开(公告)日:2017-05-11
The present invention relates to a new process for preparing brivaracetam. (Ib)
本发明涉及一种制备布利维拉西坦的新工艺。(Ib)
[EN] ENANTIOSELECTIVE SYNTHESIS OF BRIVARACETAM AND INTERMEDIATES THEREOF<br/>[FR] SYNTHÈSE ÉNANTIOSÉLECTIVE DE BRIVARACÉTAM ET DE SES INTERMÉDIAIRES
申请人:CLININVENT RES PVT LTD
公开号:WO2020148787A1
公开(公告)日:2020-07-23
The present invention relates to an improved and economical process for enantioselective synthesis and purification of a novel key intermediate of Brivaracetam. Further, the present invention also relates to a process for the preparation of a chirally pure Brivaracetam of formula I utilizing the said intermediate.