procedure for the manufacture of 6 - chloro - n - methyl - 2,3,4,5-tetrafluorobenzoic tetrahydro - lh benzazepin

摘要

A novel process for preparing 6-chloro-N-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine comprising cyclizing N-methyl-N-[2-(2'-chlorophenyl)ethyl]-2-chloroethylamine hydrochloride in a solution of trichlorobenzene and aluminum chloride.