Process for the preparation of enantiomerically pure 1-substituted-3-aminoalcohols
申请人:Lonza AG
公开号:EP1566383A1
公开(公告)日:2005-08-24
Provided is a process for the preparation of enantiomerically pure 1-substituted-3-amino-alcohols, particularly of (S)-(-)- and (R)-(+)-3-N-methylamino-1-(2-thienyl)-1-propanol, by asymmetrically hydrogenating salts of a carboxylic acids with an aminoketone of the formula
wherein R1 is selected from the group consisting of 2-thienyl, 2-furanyl and phenyl, each optionally substituted with one or more halogen atoms and/or one or more C1-4-alkyl or C1-4-alkoxy groups, and wherein R2 is C1-4-alkyl or phenyl, each optionally substituted with one or more halogen atoms and/or one or more C1-4-alkyl or C1-4-alkoxy groups,
and wherein the corresponding aminoalcohols are obtained by subsequent hydrolysis of their salts. Furthermore provided are salts of a carboxylic acid with said aminoketones and the aminoalcohols obtained by asymmetriacally hydrogenating said aminoketones, respectively.
提供了一种制备对映纯1-取代-3-氨基醇的方法,特别是(S)-(-)-和(R)-(+)-3-N-甲基氨基-1-(2-噻吩基)-1-丙醇,通过将羧酸的盐与具有以下结构的氨基酮进行不对称加氢反应来实现。其中R1选自2-噻吩基、2-呋喃基和苯基,每种都可以选择性地取代一个或多个卤素原子和/或一个或多个C1-4-烷基或C1-4-烷氧基,而R2是C1-4-烷基或苯基,每种都可以选择性地取代一个或多个卤素原子和/或一个或多个C1-4-烷基或C1-4-烷氧基,并通过将它们的盐经过后续水解获得相应的氨基醇。此外,还提供了羧酸与所述氨基酮的盐以及通过不对称加氢所述氨基酮获得的氨基醇。