A process for the preparation of 4,6-dihalopyrimidin-5-aminesof formula (II), or salts thereof, which comprises reacting 5-aminopyrimidin-4,6-diols of formula (III), or salts thereof, or a solvate either of the compound of formula (III) or of a salt thereof, with a halogenating agent, new intermediates useful in the preparation of the compound of formula (II) and processes for the preparation of these intermediates. The invention also refers to a process for the preparation of ticagrelor or a pharmaceutically acceptable saltthereoffrom 4,6-dihalo-2- (propylthio)pyrimidin-5-amine of formula (IIA).
一种制备式(II)的4,6-二卤
嘧啶-5-胺或其盐的方法,包括将式(III)的5-
氨基嘧啶-4,6
-二醇或其盐,或者化合物式(III)或其盐的溶剂与卤代试剂反应,新的中间体有助于制备式(II)的化合物以及制备这些中间体的方法。该发明还涉及一种从式(IIA)的4,6-二卤-2-(
丙硫基)
嘧啶-5-胺制备
替卡格雷洛或其药学上可接受的盐的方法。