[EN] PROCESS FOR PREPARATION OF PAROXETIN INTERMEDIATE<br/>[FR] PROCEDE DE PREPARATION D'UN INTERMEDIAIRE DE PAROXETINE
申请人:SMITHKLINE BEECHAM PLC
公开号:WO2001014335A1
公开(公告)日:2001-03-01
A trans-piperidinedione of formula (1), where R is a benzyl group and R' is an optionally substituted C1-6-alkyl, aryl-C1-6-alkyl, C1-6-allyl or aryl group, which process comprises the reaction of a cinnamate ester of formula (3), where R'' has independently the same meaning as R', with a malonamide (4) in the presence of a strong base. Compound (2) is used in the presentation of paroxetine. The preparation of paroxetine by the route from compounds (3 and 4) avoids the formation of difficult to remove impurities found in other routes.