CN114031543A — 一种帕罗韦德中间体的制备方法
Assigned to Shanghai Puyi Chemical Technology Co Ltd · Expires 2022-02-11 · 4y expired
What this patent protects
本发明提出一种帕罗韦德中间体(1S,3aS,4aR)‑2‑[(2S)‑3,3‑二甲基‑1‑氧亚基‑2‑[(三氟乙酰基)氨基]丁基]‑4,4‑二甲基‑2,3,3a,4a‑四氢‑1H‑环丙并[1,2‑c]吡咯‑1‑甲酸(I)的合成方法。该方法以(1S,3aS,4aR)‑4,4‑二甲基‑2,3,3a,4a‑四氢‑1H‑环丙并[1,2‑c]吡咯‑1‑甲酸甲酯(III)和L‑叔亮氨酸(V)为原料，先将原料(III)水解成(1S,3aS,4aR)‑4,4‑二甲基‑2,3,3a,4a‑四氢‑1H‑环丙并[1,2‑c]吡咯‑1‑甲酸(II)，将L‑叔亮氨酸(V)用三氟乙…
USPTO Abstract
本发明提出一种帕罗韦德中间体(1S,3aS,4aR)‑2‑[(2S)‑3,3‑二甲基‑1‑氧亚基‑2‑[(三氟乙酰基)氨基]丁基]‑4,4‑二甲基‑2,3,3a,4a‑四氢‑1H‑环丙并[1,2‑c]吡咯‑1‑甲酸(I)的合成方法。该方法以(1S,3aS,4aR)‑4,4‑二甲基‑2,3,3a,4a‑四氢‑1H‑环丙并[1,2‑c]吡咯‑1‑甲酸甲酯(III)和L‑叔亮氨酸(V)为原料，先将原料(III)水解成(1S,3aS,4aR)‑4,4‑二甲基‑2,3,3a,4a‑四氢‑1H‑环丙并[1,2‑c]吡咯‑1‑甲酸(II)，将L‑叔亮氨酸(V)用三氟乙酰基保护得到N‑三氟乙酰基‑L‑叔亮氨酸(IV)；最后中间体(II)与中间体(IV)缩合，即可得到化合物(I)。本发明采用汇聚式合成路线，只需要三步反应就可以得到化合物(I)，缩短了合成路线，为化合物(I)的制备提供了新的方法。
Drugs covered by this patent
- Paxlovid (Copackaged) (Nirmatrelvir) · Pfizer
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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