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    • 75. 发明申请
    • Process for the preparation of n-monosubstituted beta-amino alcohols
    • 制备正单取代的β-氨基醇的方法
    • US20050256318A1
    • 2005-11-17
    • US10520362
    • 2003-07-09
    • Dominique Michel
    • Dominique Michel
    • C07D333/58C07C213/00C07C213/08C07C215/08C07C221/00C07C225/12C07C225/16C07D307/02C07D307/46C07D307/52C07D333/22
    • C07C213/00C07C221/00C07C225/16C07D307/46C07D333/22
    • A process for the preparation of a compound of formula and/or an addition salt of a proton acid, wherein R1 and R2 independently represent alkyl, cycloalkyl, aryl or aralkyl, each aryl or aralkyl being optionally further substituted with alkyl, alkoxy and/or halogen, which process comprises the following steps: (a) reacting a mixture comprising (i) a methyl ketone of formula wherein R1 is as defined above, and (ii) a compound of formula H2N—R2   (V) and/or an addition salt of proton acid, wherein R2 is as defined above, and (iii) formaldehyde or a source of formaldehyde selected from the group consisting of formaldehyde in aqueous solution, 1,3,5-trioxane, paraformaldehyde and mixtures thereof, in the presence of a solvent selected from the group consisting of water, aliphatic alcohols, cycloaliphatic alcohols and mixtures thereof, and optionally a proton acid to afford a β-amino ketone of formula and/or an addition salt of a proton acid, and (b) reducing the carbonyl group of said β-amino ketone to afford a compound of formula I, and/or an addition salt of a proton acid wherein the first step is carried out at a pressure above 1.5 bar.
    • 制备式和/或质子酸加成盐的方法,其中R 1和R 2独立地代表烷基,环烷基,芳基或芳烷基 每个芳基或芳烷基任选进一步被烷基,烷氧基和/或卤素取代,该方法包括以下步骤:(a)使包含(i)下式的甲酮:其中R 1, 如上所定义,和(ii)式<β的化合物在线公式描述=“在线公式”end =“lead”→> H 2 NR < (V)<?in-line-formula description =“In-line Formulas”end =“tail”?>和/或质子酸的加成盐,其中R 2为 和(iii)甲醛或甲醛源,其选自甲醛在水溶液中,1,3,5-三恶烷,多聚甲醛及其混合物,在选自水的溶剂存在下, 脂族醇,环脂 醇和其混合物,以及任选的质子酸,得到式和(或)质子酸的加成盐的β-氨基酮,和(b)还原所述β-氨基酮的羰基,得到 式I和/或质子酸的加成盐,其中第一步在高于1.5巴的压力下进行。