PROCESS FOR THE PREPARATION OF (1S, 4S) - 4 - (3,4 - DICHLOROPHENYL) - 1,2,3,4 -TETRAHYDRO - N - METHYL- 1- NAPHTHYLAMIME HYDROCHLORIDE

摘要

A process for the preparation of (IS,4S)-4-(3,4-dichlorophenyl)-1,2,3,4-tetrahydro-N-methyl-1-naphthylamine hydrochloride, compound of formula I, as crystalline form I or form V directly from compound of formula II or by treating the free base of compound of formula II with amine hydrochloride salt in suitable solvent(s).