Disclosed in the present invention is a method for preparing Ticagrelor (I), comprising the following steps: a cyclization reaction of 5-amino-1,4-di-substituted-1,2,3-triazole (II) and dialkyl carbonate (HI), to obtain 9-substituted-2,6-dihydroxy-8-azapurine (IV); chlorination of intermediate (IV), to obtain 9-substituted-2,6-dichloro-8-azapurine (V); an amination reaction of intermediate (V) and trans-(1R,2S)-2-(3,4-difluorophenyl)cyclopropanamine (VI) generates 9-substituted-6-amino-substituted-2-chloro-8-azapurine (VII); and a propanethiolation reaction of intermediate (VII) and propanethiol (VIII), to obtain Ticagrelor (I). The preparation method is simple in process, has a high chemical and chiral purity and provides a new preparation method for industrializing Ticagrelor. In addition, also provided in the present invention are intermediates of Ticagrelor and a preparation method thereof, wherein raw materials of the preparation method are easily available, the conditions thereof are mild, and the yield thereof is high.
本发明公开了一种制备Ticagrelor(I)的方法,包括以下步骤:将5-
氨基-1,4-二取代-
1,2,3-三唑(II)和二烷基
碳酸酯(HI)进行环化反应,得到9-取代-2,6-二羟基-8-氮杂
嘌呤(IV);将中间体(IV)进行
氯化反应,得到9-取代-2,6-二
氯-8-氮杂
嘌呤(V);将中间体(V)与反式-
(1R,2S)-2-(3,4-二氟苯基)环丙胺(VI)进行
氨化反应,生成9-取代-6-
氨基-取代-2-
氯-8-氮杂
嘌呤(VII);将中间体(VII)与丙
硫醇(VIII)进行丙
硫醇化反应,得到Ticagrelor(I)。该制备方法工艺简单,
化学和手性纯度高,并为工业化Ticagrelor提供了新的制备方法。此外,本发明还提供了Ticagrelor的中间体及其制备方法,其中制备方法的原料易得,条件温和,产率高。