申请人:Pennwalt Corporation
公开号:US04282146A1
公开(公告)日:1981-08-04
Certain 1,2,4,5-tetrahydro-7-alkoxy-(and 7,8-dialkoxy)-3H,3-benzazepines are prepared in excellent yields by a three step process comprising reacting a 3-alkoxy-(or 3,4-dialkoxy)-phenethylamine with a halo-acetaldehyde dialkylacetal to form the corresponding N-(2,2-dialkoxyethyl) phenethylamine, reacting that product with BF.sub.3 to close the ring and to form a 1-alkoxy-1,2,3,4-tetrahydro-7-alkoxy-(or 7,8-dialkoxy)-3H,3-benzazepine and reacting that product under reductive cleavage conditions to remove the 1-alkoxy group and to obtain the desired benzazepine. The benzazepines can be further reacted in the known manner or in the manner disclosed herein to form certain 3-substituted benzazepines.
通过一个三步过程,包括将3-烷氧基-(或3,4-二烷氧基)-苯乙胺与卤代乙醛二烷基缩醛反应形成相应的N-(2,2-二烷氧基乙基)苯乙胺,然后将产物与BF.sub.3反应以闭环并形成1-烷氧基-1,2,3,4-四氢-7-烷氧基-(或7,8-二烷氧基)-3H,3-苯并脑啡,最后在还原解离条件下将产物反应以去除1-烷氧基并获得所需的苯并脑啡。这些苯并脑啡可以进一步按照已知方法或本文所披露的方法反应以形成某些3-取代苯并脑啡。