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。