申请人:Eli Lilly and Company
公开号:US04175197A1
公开(公告)日:1979-11-20
Novel 1,3,4-trisubstituted-4-arylpiperidines are prepared by alkylating a 2,3-disubstituted-3-arylpyrroline to afford a 1,2,3-trisubstituted-3-aryl-1-pyrrolinium salt, reacting the salt with diazomethane to provide a 1,2,3-trisubstituted-3-aryl-1,2-methylene-pyrrolidinium salt, heating the pyrrolidinium salt to effect a ring expansion to the corresponding 1,3,4-trisubstituted-4-aryl-1,4,5,6-tetrahydropyridinium salt, neutralizing the salt and reducing the tetrahydropyridine to provide a 1,3,4-trisubstituted-4-arylpiperidine. The piperidines so formed are useful as pharmacological agents and as intermediates in the preparation of other piperidines of the invention. The compounds provided herein are especially useful as narcotic agonists analgesics and as narcotic antagonists.
本发明涉及制备1,3,4-三取代-4-芳基哌啶的方法,包括烷基化2,3-二取代-3-芳基吡咯烷以得到1,2,3-三取代-3-芳基-1-吡咯铵盐,将该盐与重氮甲烷反应以提供1,2,3-三取代-3-芳基-1,2-亚甲基吡咯啉铵盐,加热吡咯啉盐以实现环扩张到相应的1,3,4-三取代-4-芳基-1,4,5,6-四氢吡啶铵盐,中和盐并还原四氢吡啶以提供1,3,4-三取代-4-芳基哌啶。所制备的哌啶化合物可用作药理学制剂和本发明的其他哌啶化合物的中间体。本发明提供的化合物特别适用于作为麻醉药物激动剂镇痛剂和麻醉药物拮抗剂。