申请人:Merck & Co., Inc.
公开号:US03981877A1
公开(公告)日:1976-09-21
The new 1-alkyl-4-(1, 2, or 3-carboxy-5H-dibenzo[a,d]cyclohepten-5-ylidene)-piperidine compounds are prepared from the corresponding 1, 2 or 3-carboxy-5H-dibenzo[a,d]cyclohepten-5-one by reaction with a Grignard reagent prepared from a 1-alkyl-4-halo piperidine to form an intermediate carbinol, or a 1, 2 or 3-carboxy-5-(1-alkyl-4-piperidyl)-5H-dibenzo[a,d]cyclohepten-5-ol which is then dehydrated to produce the desired 1-alkyl-4-(1, 2 or 3-carboxy-5H-dibenzo[a,d]cyclohepten-5-ylidene)-piperidine, or alternatively by hydrolysis of a 1-alkyl-4-(1, 2 or 3-cyano-5H-dibenzo[a,d]cyclohepten-5-ylidene)-piperidine compound to form the corresponding 1-alkyl-4-(1, 2 or 3-carboxy-5H-dibenzo[a,d]cyclohepten-5-ylidene)-piperidine compound.
新的1-烷基-4-(1、2或3-羧基-5H-二苯并[a,d]环庚烯-5-亚甲基)-哌啶化合物是通过将相应的1、2或3-羧基-5H-二苯并[a,d]环庚烯-5-酮与由1-烷基-4-卤代哌啶制备的Grignard试剂反应形成中间的醇或1、2或3-羧基-5-(1-烷基-4-哌啶基)-5H-二苯并[a,d]环庚烯-5-醇来制备的,然后脱水以产生所需的1-烷基-4-(1、2或3-羧基-5H-二苯并[a,d]环庚烯-5-亚甲基)-哌啶,或者通过水解1-烷基-4-(1、2或3-氰基-5H-二苯并[a,d]环庚烯-5-亚甲基)-哌啶化合物形成相应的1-烷基-4-(1、2或3-羧基-5H-二苯并[a,d]环庚烯-5-亚甲基)-哌啶化合物。