申请人:Eli Lilly and Company
公开号:US04081450A1
公开(公告)日:1978-03-28
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.
通过烷基化2,3-二取代的3-芳基吡咯啉,制备得到1,2,3-三取代的3-芳基-1-吡咯啉鎓盐,将该盐与重氮甲烷反应,得到1,2,3-三取代的3-芳基-1,2-亚甲基吡咯啉鎓盐,加热该吡咯啉鎓盐,使其环扩张为相应的1,3,4-三取代的4-芳基-1,4,5,6-四氢吡啶鎓盐,中和该盐并还原四氢吡啶,得到1,3,4-三取代的4-芳基哌啶。由此形成的哌啶可用作药理学试剂,以及制备本发明其他哌啶的中间体。本发明提供的化合物特别适用于作为麻醉性镇痛剂和麻醉性拮抗剂。