[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<br/>[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
申请人:YUHAN CORP
公开号:WO2020204647A1
公开(公告)日:2020-10-08
The present invention provides a novel process for preparing (3R,4R)-1-benzyl-N,4-dimethylpiperidin-3-amine or a salt thereof, which is an intermediate useful for the preparation of tofacitinib. The present invention also provides a novel intermediate used in the process, i.e., isopropanol solvate of methyl ((3R,4R)-1-benzyl-4-methylpiperidin-3-yl)carbamate dibenzoyl-L-tartrate. The present invention also provides a novel intermediate, having excellent stability, useful for the preparation of tofacitinib, i.e., (3R,4R)-1-benzyl-N,4-dimethylpiperidin-3-amine acetate. In addition, the present invention provides a process for preparing tofacitinib or a pharmaceutically acceptable salt thereof using the process.
本发明提供了一种新型制备(3R,4R)-1-苄基-N,4-二甲基哌啶-3-胺或其盐的方法,该中间体可用于制备托法替尼。本发明还提供了一种用于该方法的新型中间体,即甲醇异丙醇溶剂合成的甲基((3R,4R)-1-苄基-4-甲基哌啶-3-基)氨基甲酸酯二苯甲酰-L-酒石酸盐。本发明还提供了一种具有良好稳定性的用于制备托法替尼的新型中间体,即(3R,4R)-1-苄基-N,4-二甲基哌啶-3-胺醋酸盐。此外,本发明还提供了一种使用该方法制备托法替尼或其药学上可接受的盐的方法。