Process for the preparation of substantially pure polymorphic Form 1 of clopidogrel hydrogensulfate, wherein the reaction of optically active clopidogrel base with sulfuric acid is carried out in the mixture of at least two solvents, chosen from group I, comprising aliphatic ethers, and from group II, comprising ketones, esters of C
1
-C
3
carboxylic acids and aliphatic alcohols C
1
-C
4
, primary, secondary and tertiary aliphatic alcohols C
1
-C
4
, then the resulting suspension is stirred until at least 70% of amorphous clopidogrel hydrogensulfate formed is transformed into polymorphic Form 1 of clopidogrel hydrogensulfate, and finally, the crystalline solid is isolated from the reaction mixture and subject to additional work-up procedure, aiming at the formation and stabilization of polymorphic Form 1.
制备高度纯净的氢苏
氯吡格雷多晶型1的过程,其中对映活性的
氯吡格雷碱与
硫酸在至少两种溶剂混合物中进行反应,所述溶剂分别选自I组,包括脂肪醚,和II组,包括
酮类,C1-C3
羧酸酯和脂肪族醇C1-C4,一级、二级和三级脂肪族醇C1-C4,然后搅拌所得的悬浮液,直至形成的非晶态氢苏
氯吡格雷至少70%转化为多晶型1的氢苏
氯吡格雷,最后,从反应混合物中分离出晶体固体,并进行额外的工艺处理,旨在形成和稳定多晶型1。