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    • 56. 发明申请
    • PROCESS FOR PRODUCTION OF PIPERIDINE DERIVATIVES
    • 生产哌啶衍生物的方法
    • US20100137605A1
    • 2010-06-03
    • US12686516
    • 2010-01-13
    • Thomas E. D'AmbraGarry M. Pilling
    • Thomas E. D'AmbraGarry M. Pilling
    • C07D211/34
    • C07D211/22C07D211/14C07D211/20C07D211/46
    • The present invention is directed to a process for preparing the piperidine derivative compound 4-[4-[4-hydroxydiphenylmethyl)-1-piperidinyl]-1-hydroxybutyl]-α,α-dimethylphenylacetic acid of formula comprising the sequential steps of: (1) reacting 4-bromo-α,α-dimethyl-α-(4,4-dimethylisoxazolin-2-yl) toluene with N,N-dimethyl cyclopropylcarboxylic acid amide to provide 4-(cyclopropyl-oxo-methyl)-α,α-dimethyl-α-(4,4-dimethyloxozolin-2-yl) toluene; (2) hydrolyzing said 4-(cyclopropyl-oxo-methyl)-α,α-dimethyl-α-(4,4-dimethyloxozolin-2-yl) toluene to provide 4-(4-chloro-1-oxobutyl)-α,α-dimethylphenylacetic acid; (3) reacting said 4-(4-chloro-1-oxobutyl)-α,α-dimethylphenylacetic acid with methanol to provide methyl 4-(4-chloro-1-oxobutyl)-α,α-dimethylphenylacetate; (4) reacting said methyl 4-(4-chloro-1-oxobutyl)-α,α-dimethylphenylacetate with 4-(α,α-diphenyl)piperidinemethanol to provide methyl 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-oxobutyl]-α,α-dimethylphenylacetate; (5) reducing said methyl 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-oxobutyl]-α,α-dimethylphenylacetate to provide methyl 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-hydroxybutyl]-α,α-dimethylphenylacetate; and (6) hydrolyzing said methyl 4-[4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]-1-hydroxybutyl]-α,α-dimethylphenylacetate to provide said 4-[4-[4-hydroxydiphenylmethyl)-1-piperidinyl]-1-hydroxybutyl]-α,α-dimethylphenylacetic acid.
    • 本发明涉及制备下式的哌啶衍生化合物4- [4- [4-羟基联苯甲基)-1-哌啶基] -1-羟基丁基]-α,α-二甲基苯基乙酸的方法,其包括以下顺序步骤:( 1)使4-溴-α,α-二甲基-α-(4,4-二甲基异恶唑啉-2-基)甲苯与N,N-二甲基环丙基羧酸酰胺反应,得到4-(环丙基 - 氧代 - 甲基)-α, α-二甲基-α-(4,4-二甲基恶唑啉-2-基)甲苯; (2)水解所述4-(环丙基 - 氧代甲基)-α,α-二甲基-α-(4,4-二甲基恶唑啉-2-基)甲苯,得到4-(4-氯-1-氧代丁基)-α ,α-二甲基苯乙酸; (3)使所述4-(4-氯-1-氧代丁基)-α,α-二甲基苯基乙酸与甲醇反应,得到4-(4-氯-1-氧代丁基)-α,α-二甲基苯基乙酸甲酯; (4)使4-(4-氯-1-氧代丁基)-α,α-二甲基苯基乙酸甲酯与4-(α,α-二苯基)哌啶甲醇反应,得到4- [4- [4-(羟基二苯基甲基)-1 - 哌啶基] -1-氧代丁基]-α,α-二甲基苯基乙酸酯; (5)还原4- [4- [4-(羟基二苯基甲基)-1-哌啶基] -1-氧代丁基]-α,α-二甲基苯基乙酸甲酯,得到4- [4- [4-(羟基二苯基甲基)-1- 哌啶基] -1-羟基丁基]-α,α-二甲基苯基乙酸酯; 和(6)水解所述4- [4- [4-(羟基二苯基甲基)-1-哌啶基] -1-羟基丁基]-α,α-二甲基苯基乙酸甲酯,得到所述4- [4- [4-羟基二苯基甲基)-1- 哌啶基] -1-羟基丁基]-α,α-二甲基苯基乙酸。