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)
揭示了一种新颖的工业规模合成
托法替尼柠檬酸盐的方法,具有高产率和纯度,从顺式-(
1-苄基-4-甲基哌啶-3-基)
甲胺双盐酸盐(中间体VIII)开始,包括:1. 中间体VII和VIII之间的缩合反应形成中间体VI2. 中间体VI的加氢反应形成中间体V3. 中间体V的拆分反应形成对映纯度>99%的中间体IV4. 在碱性介质中释放中间体IV形成中间体III5. 中间体III的N-酰化反应形成II (
托法替尼)6. 中间体II的盐化反应形成
托法替尼单
柠檬酸盐(I)