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    • 38. 发明申请
    • PROCESS FOR PREPARATION OF beta -PHENETHYLAMINE DERIVATIVE
    • 制备β-苯甲酰胺衍生物的方法
    • WO0236540A2
    • 2002-05-10
    • PCT/IB0101996
    • 2001-10-25
    • C07C209/28C07C211/29
    • C07C211/29C07C209/28C07C2601/04
    • A process for the production of Sibutramine i.e. N-1-[1-(4-chlorophenyl) cyclobutyl]-3-methylbutyl-N, N-dimethylamine of formula (I) comprising the steps of: (a) reacting a nitrile, 1-(4-chlorophenyl) cyclobutyl carbonitrile of formula (III) with a Grignard reagent, namely isobutyl magnesium bromide to produce the magnesium complex of formula (IV); (b) cleaving the magnesium complex of formula (IV) under basic conditions to form an imine of formula (VIII); (c) reducing the imine of formula (VIII) by a metal hydride to obtain an amine of the formula (VII), and (d) converting the amine (VII) first to its hydrochloride and then to Sibutramine of formula (I) by Eschweiler Clarke methylation.
    • 制备西布曲明的方法,即式(I)的N-1- [1-(4-氯苯基)环丁基] -3-甲基丁基-N,N-二甲胺的方法,包括以下步骤:(a)使腈, (III)的(4-氯苯基)环丁基腈与格氏试剂即异丁基溴化镁反应以制备式(IV)的镁络合物; (b)在碱性条件下裂解式(IV)的镁络合物以形成式(VIII)的亚胺; (c)用金属氢化物还原式(Ⅷ)的亚胺,得到式(Ⅶ)的胺,(d)首先将胺(Ⅶ)转化成盐酸盐,然后转化成式(I)的西布曲明,由 Eschweiler克拉克甲基化。