PROCESS FOR THE PREPARATION OF O-DESMETHYL-VENLAFAXINE AND SALTS THEREOF
申请人:Koftis Theoharis V.
公开号:US20120253074A1
公开(公告)日:2012-10-04
The present invention relates to a novel process for the preparation of O-desmethyl venlafaxine (ODV) and the pharmaceutically acceptable salts thereof, wherein it comprises (i) provision of spiro-venlafaxine compound as intermediate; (ii) conversion of spiro-venlafaxine intermediate into ODV free base in a one-pot process; and (iii) optionally conversion ODV free base into pharmaceutically acceptable salts. The present invention further relates to novel processes for the preparation of crystalline salts of OD V-succinate and ODV-oxalate.