[EN] METHOD FOR THE PREPARATION OF BETA-SUBSTITUTED GAMMA-AMINO CARBOXYLIC ACIDS<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'ACIDES GAMMA-AMINOCARBOXYLIQUES SUBSTITUÉS EN POSITION BÊTA
申请人:SIEGFRIED LTD
公开号:WO2015189068A1
公开(公告)日:2015-12-17
The present invention relates to the preparation of β-substituted γ-amino carboxylic acids, preferably in enantiomerically enriched or even enantiomerically pure form, by a one-pot conversion of a β-substituted γ-nitro dicarboxylic acid ester or of a β-substituted γ-nitro dicarboxylate of general formula to a β-substituted γ-nitro carboxylic acid and a subsequent reduction of the γ-nitro group to an amine group. In particular, the present invention relates to the preparation of ( S ) -pregabalin. In addition, the formation of enantiomerically enriched β-substituted γ-amino carboxylic acids and β-substituted γ-nitronate carboxylic acid salts are also described.
本发明涉及通过一锅法将β-取代γ-硝基二羧酸酯或一般式的β-取代γ-硝基二羧酸酯转化为β-取代γ-硝基羧酸,然后将γ-硝基还原为胺基,从而制备β-取代γ-氨基羧酸,优选为对映富集或甚至对映纯形式。特别是,本发明涉及(S)-盐酸普拉巴林的制备。此外,还描述了对映富集的β-取代γ-氨基羧酸和β-取代γ-硝酸盐的形成。