[EN] A PROCESS FOR THE PREPARATION OF AN ANTICONVULSANT AGENT PREGABALIN HYDROCHLORIDE<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION D'UN AGENT ANTICONVULSIVANT : LE CHLORHYDRATE DE PRÉGABALINE
申请人:COUNCIL SCIENT IND RES
公开号:WO2014181359A1
公开(公告)日:2014-11-13
An efficient synthesis of the anticonvulsant drug, Pregabalin hydrochloride is described using simple transformations in high enantiopurity (>99% ee) and overall yield of 44 to 50%.
Solvent-free organocatalytic Michael addition of diethyl malonate to nitroalkenes: the practical synthesis of Pregabalin and γ-nitrobutyric acid derivatives
作者:Jin-ming Liu、Xin Wang、Ze-mei Ge、Qi Sun、Tie-ming Cheng、Run-tao Li
DOI:10.1016/j.tet.2010.11.053
日期:2011.1
enantioselective synthesis of Pregabalin 1 hydrochloride with good overall yield (44%) and enantioselectivity (98% ee) was described. The key step is an asymmetric Michael addition of equivalent of diethylmalonate and nitroalkene under solvent-free conditions using thiourea 2 as catalyst. The reaction can be applied to a variety of aromatic and aliphatic substituted nitroalkenes affording corresponding
[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.