An alternative and improved process for the preparation of Apremilast (Formula I) and Apremilast form B or a pharmaceutically acceptable salt thereof is provided. The novel process includes hydrogenation in acetone, Cyclization and acetylation followed by condensation in methyl isobutyl ketone (MIBK) and acetic acid mixture in specific volume ratios.
本发明提供了制备阿普瑞司特(式 I)和阿普瑞司特形式 B 或其药学上可接受的盐的另一种改进工艺。新工艺包括
丙酮氢化、环化和乙酰化,然后以特定体积比在
甲基异丁基酮(
MIBK)和
乙酸混合物中缩合。