[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF APREMILAST AND ITS INTERMEDIATE<br/>[FR] PROCÉDÉ AMÉLIORÉ DE PRÉPARATION D'APRÉMILAST ET DE SON INTERMÉDIAIRE
申请人:PIRAMAL ENTPR LTD
公开号:WO2019073431A1
公开(公告)日:2019-04-18
The present invention provides an improved process for preparation of pure N-(2-(l-(3- ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl)-l,3-dioxoisoindolin-4-yl)acetamide (1) (commonly known as Apremilast); wherein the content of des-acetyl apremilast (la) is less than 1% w/w and having total amount of genotoxic substances less than 25 ppm; comprising the steps of reacting the compound l-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethan- 1-amine (A) or its chiral acid salt with N-(l,3-dioxo-l,3-dihydroisobenzofuran-4-yl)-acetamide (B) in presence of ether or amide solvent and optionally, in presence of an acid; followed by the treatment with an acetylating agent.
本发明提供了一种改进的制备纯N-(2-(1-(3-乙氧基-4-甲氧基苯基)-2-(甲磺酰基)乙基)-1,3-二氧杂异吲哚-4-基)乙酰胺(通常称为阿普利马斯特)的过程;其中去乙酰阿普利马斯特的含量小于1% w/w,且具有总基因毒性物质少于25 ppm;包括以下步骤:在醚或酰胺溶剂的存在下,将化合物1-(3-乙氧基-4-甲氧基苯基)-2-(甲磺酰基)乙基胺(A)或其手性酸盐与N-(1,3-二氧-1,3-二氢异苯并呋喃-4-基)-乙酰胺(B)反应,可选地,在酸的存在下;然后用乙酰化剂处理。