Patent ID: 7820815
Filing Date: 2010-10-26
Classification: A61P,C07B,C07D

Abstract:
1. A process for preparing a compound of the general formula (I) or an enantiomer or salt thereof, wherein R R R the process comprising: reacting a compound of the general formula (III) with 3-(phthalimido)piperidine or an enantiomer thereof wherein X is a leaving group selected from the group consisting of halogens phenylsulphonyloxy, p-toluenesulphonyloxy, methylsulphonyloxy and trifluoromethylsulphonyloxy, and R 1 to R 3 are as defined above to obtain a compound of the general formula (II) wherein R 1 to R 3 are each defined as mentioned above; and deprotecting the obtained compound of the general formula (II) to obtain the compound of general formula (I).