申请人:CHINA RESOURES SAIKE PHARMACEUTICAL CO., LTD.
公开号:US20210053928A1
公开(公告)日:2021-02-25
A resolution method of axial chiral enantiomers of lesinurad (2-(5-bromo-4-(4-cyclopropylnaphthalen-1-yl)-4H-1,2,4-triazol-3-ylthio)acetic acid) adopts inexpensive and readily available quinoline natural products and derivatives thereof, such as quinine, cinchonine, quinidine or cinconidine as resolving agents to react with lesinurad racemate in an organic solvent to form a salt, and the salt is dissociated by acidification so as to obtain optically pure (R)- or (S)-2-(5-bromo-4-(4-cyclopropylnaphthalen-1-yl)-4H-1,2,4-triazol-3-ylthio)acetic acid. The method can give axial chiral enantiomer of lesinurad in R configuration with a chiral purity ee of up to 100% and a total yield of 90% or more. The obtained axial chiral enantiomer of lesinurad in S configuration can reach a chiral purity ee of up to 99.9% and a total yield of 80% or more.
利用廉价且易得的喹啉天然产物及其衍生物(如奎宁、金奎宁、奎宁啶或金奎宁啶)作为拆分剂,与来曲尼酸的外消旋体在有机溶剂中反应形成盐,然后通过酸化使盐解离,从而获得光学纯的(R)-或(S)-2-(5-溴-4-(4-环丙基萘基)-4H-1,2,4-三唑-3-基硫基)乙酸。该方法可使来曲尼酸的轴手性对映体以R构型获得高达100%的对映纯度和90%或更高的总产率。获得的来曲尼酸的S构型的轴手性对映体可达到高达99.9%的对映纯度和80%或更高的总产率。