申请人:Pfizer Inc.
公开号:US04360700A1
公开(公告)日:1982-11-23
Process for making 1-(3-benzyloxyphenyl)-1,1-dimethylheptane, a valuable intermediate for the preparation of analgesic agents, which comprises benzylation of 3-hydroxyacetophenone to produce 3-benzyloxyacetophenone which is converted to 1-(3-benzyloxyphenyl)-1-methylheptan-1-ol via Grignard reaction with n-hexylmagnesium bromide; chlorination of said heptanol by reaction with hydrogen chloride followed by methylation of the thus-produced 1-(3-benzyloxyphenyl)-1-chloro-1-methylheptane with trimethylaluminum.
制备镇痛剂的有价中间体1-(3-苄氧基苯基)-1,1-二甲基庚烷的过程包括以下步骤:将3-羟基苯乙酮苄化,制得3-苄氧基苯乙酮,然后通过与正己基溴化镁的Grignard反应将其转化为1-(3-苄氧基苯基)-1-甲基庚醇;将该庚醇通过与氢氯酸反应进行氯化,随后使用三甲基铝甲基化所得的1-(3-苄氧基苯基)-1-氯-1-甲基庚烷进行甲基化。