| abstract |
The present invention provides a convenient and efficient process for the preparation of O-desmethylvenlafaxine (ODV), comprising the reaction of venlafaxine, or a salt thereof, with a thiol reagent such as a dithiol, an aminothiol or an inorganic thiol. The present invention also provides a process for purifying ODV base,said process comprising the steps of mixing crude ODV base with an alcohol to form a suspension and adding acid followed by base to generate ODV base with high purity. |