[EN] PROCESS FOR OBTAINING (S)-2-BENZYL-4-((3AR,7AS)-HEXAHYDRO-1 H-ISOINDOL- 2(3H)-YL)-4-OXOBUTANOIC ACID AND SALTS THEREOF<br/>[FR] PROCÉDÉ POUR L'OBTENTION D'ACIDE (S)-2-BENZYL-4-((3AR,7AS)-HEXAHYDRO-1H-ISOINDOL-2(3H)-YL)-4-OXOBUTANOÏQUE ET DE SELS DE CELUI-CI
申请人:LESVI LABORATORIOS SL
公开号:WO2013189829A1
公开(公告)日:2013-12-27
Comprising reacting compound (IV) with compound (V) in a solvent to give (S)-mitiglinide (II) and compound (III) as a by- product; removing the solvent and adding ethyl acetate to precipitate compound (III); collecting the solid and applying at least one cycle process comprising: - refluxing the solution of compound (III) with an organic solvent to give (S)-mitiglinide (II) and further compound (III) as a by-product, - removing the organic solvent and adding ethyl acetate to precipitate compound (III); and - separating the mother liquors from the solid, and mixing all the mother liquors; removing the ethyl acetate from the mother liquors to obtain (S)-mitiglinide.
Identification, Synthesis and Characterization of Impurities of (S)-Mitiglinide Calcium Dihydrate
作者:T. Umasankara Sastry、K. Nageswara Rao、T. Appi Reddy、P. Gandhi
DOI:10.14233/ajchem.2014.16137
日期:——
(S)-Mitiglinide Calcium dihydrate (1), an important potent hypoglycemic agent. During laboratory optimization and later in bulk synthesis the formation of various impurities was observed. The method of preparation of most of these impurities is not available in literature. We describe herein the formation, synthesis, preparation and characterization of these impurities.
Asymmetric hydrogenation of various 3-substituted maleic anhydrides catalyzed by Rh/bisphosphine-thiourea (ZhaoPhos) under mild conditions was successfully developed. A wide range of 3-alkyl and 3-aryl maleic anhydrides was hydrogenated well to...