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    • 1. 发明申请
    • PROCESS FOR THE PREPARATION OF PIPERAZINE BENZOTHIAZOLES
    • 制备哌嗪苯并噻唑的方法
    • WO2008125518A2
    • 2008-10-23
    • PCT/EP2008/054055
    • 2008-04-03
    • LABORATOIRES SERONO SASCHIAVO, CesarePOMA, MarcoNADLER, William
    • SCHIAVO, CesarePOMA, MarcoNADLER, William
    • C07D295/18C07D417/06
    • C07D417/06C07D295/185
    • The present invention discloses a process for the preparation of compounds of formula (I) where the groups and symbols are as defined in the description, said process comprising a) reacting a benzothiazol-2-ylacetonitrile bearing group R 1 with an activated pyrimidine, in a reaction medium; then treating the obtained derivative in said reaction medium with a weak base anion exchange resin; then, after removing said resin and isolating the reaction product, reacting it with a substituted piperazine -benzyl-alkyloxy. The final product can optionally be salified. The invention also relates to the preparation of N-acyl-substituted piperazine -benzyl- alkyloxy, comprising treating a bromide-alkyl-phenyl-4-ester wherein the ester group is selected from COOMe or COOEt with DIBAL to obtain (4- bromomethyl-phenyl)-methanol and reacting the latter with 1-piperazin-1-yl-acyl. The processes here disclosed present a number of advantages, for example, higher yield and purity of final product. Moreover, in case of piperazine group bearing hydrogen or an acyl group in position 4, the preparation of the intermediate substituted piperazine -benzyl-alkyloxy (V) need no protection/deprotection steps.
    • 本发明公开了一种制备式(I)化合物的方法,其中基团和符号如说明书中所定义,所述方法包括a)使具有基团R 1的苯并噻唑-2-基乙腈/ >与活化的嘧啶反应; 然后用弱碱阴离子交换树脂处理所得反应介质中的衍生物; 然后,在除去所述树脂并分离反应产物后,与取代的哌嗪 - 苄基 - 烷氧基反应。 最终产品可以任选地成盐。 本发明还涉及N-酰基取代的哌嗪 - 苄基 - 烷氧基的制备,包括用DIBAL处理酯基选自COOMe或COOEt的溴化烷基苯基-4-酯,得到(4-溴甲基 - 苯基) - 甲醇,并将其与1-哌嗪-1-基 - 酰基反应。 这里公开的方法具有许多优点,例如最终产物的较高产率和纯度。 此外,在位置4具有氢或酰基的哌嗪基的情况下,中间体取代的哌嗪 - 苄基 - 烷氧基(V)的制备不需要保护/脱保护步骤。
    • 3. 发明申请
    • PROCESS FOR THE PREPARATION OF PIPERAZINE BENZOTHIAZOLES
    • 制备哌嗪苯并噻唑的方法
    • WO2008125518A3
    • 2009-04-30
    • PCT/EP2008054055
    • 2008-04-03
    • MERCK SERONO SASCHIAVO CESAREPOMA MARCONADLER WILLIAM
    • SCHIAVO CESAREPOMA MARCONADLER WILLIAM
    • C07D295/18C07D417/06
    • C07D417/06C07D295/185
    • The present invention discloses a process for the preparation of compounds of formula (I) where the groups and symbols are as defined in the description, said process comprising a) reacting a benzothiazol-2-ylacetonitrile bearing group R1 with an activated pyrimidine, in a reaction medium; then treating the obtained derivative in said reaction medium with a weak base anion exchange resin; then, after removing said resin and isolating the reaction product, reacting it with a substituted piperazine -benzyl-alkyloxy. The final product can optionally be salified. The invention also relates to the preparation of N-acyl-substituted piperazine -benzyl- alkyloxy, comprising treating a bromide-alkyl-phenyl-4-ester wherein the ester group is selected from COOMe or COOEt with DIBAL to obtain (4- bromomethyl-phenyl)-methanol and reacting the latter with 1-piperazin-1-yl-acyl. The processes here disclosed present a number of advantages, for example, higher yield and purity of final product. Moreover, in case of piperazine group bearing hydrogen or an acyl group in position 4, the preparation of the intermediate substituted piperazine -benzyl-alkyloxy (V) need no protection/deprotection steps.
    • 本发明公开了一种制备式(I)化合物的方法,其中基团和符号如说明书中所定义,所述方法包括a)使具有基团R 1的苯并噻唑-2-基乙腈与活化的嘧啶反应, 反应介质; 然后用弱碱阴离子交换树脂处理所得反应介质中的衍生物; 然后,在除去所述树脂并分离反应产物后,与取代的哌嗪 - 苄基 - 烷氧基反应。 最终产品可以任选地成盐。 本发明还涉及N-酰基取代的哌嗪 - 苄基 - 烷氧基的制备,包括用DIBAL处理酯基选自COOMe或COOEt的溴化烷基苯基-4-酯,得到(4-溴甲基 - 苯基) - 甲醇,并将其与1-哌嗪-1-基 - 酰基反应。 这里公开的方法具有许多优点,例如最终产物的较高产率和纯度。 此外,在位置4具有氢或酰基的哌嗪基的情况下,中间体取代的哌嗪 - 苄基 - 烷氧基(V)的制备不需要保护/脱保护步骤。