[EN] PROCESSES FOR PREPARING (3R,4R)-1-BENZYL-N,4-DIMETHYLPIPERIDIN-3-AMINE OR A SALT THEREOF AND PROCESSES FOR PREPARING TOFACITINIB USING THE SAME [FR] PROCÉDÉS DE PRÉPARATION DE (3R,4R)-1-BENZYL-N,4-DIMÉTHYLPIPÉRIDIN-3-AMINE OU D'UN SEL DE CELUI-CI ET PROCÉDÉS DE PRÉPARATION DE TOFACITINIB L'UTILISANT
EFFICIENT METHOD FOR THE PREPARATION OF TOFACITINIB CITRATE
申请人:OLON S.p.A.
公开号:US20160297825A1
公开(公告)日:2016-10-13
Disclosed is a novel process for the synthesis of tofacitinib citrate on an industrial scale with high yields and purity starting with cis-(1-benzyl-4-methyl-piperidin-3-yl)methylamine bis-hydrochloride racemate (intermediate VIII), which comprises:
1. Condensation between intermediates VII and VIII to give intermediate VI
2. Hydrogenation of intermediate VI to give intermediate V
3. Resolution of intermediate V to give intermediate IV with enantiomeric purity >99%
4. Release of intermediate IV in a basic medium to give intermediate III
5. N-acylation reaction of intermediate III to give II (tofacitinib)
6. Salification of intermediate II to give tofacitinib monocitrate (I)