This invention relates to novel intermediate, formula (A) for rivaroxaban and process for the preparation thereof. Further it extends to the process for preparation of rivaroxaban by using the said novel intermediate, by treating with 5-chlorothiophene carbonyl chloride to form the rivaroxaban derivatives of formula (B). The obtained formula (B) further treated with acid to form rivaroxaban.
本发明涉及一种新型中间体,式(A)的制备方法,用于制备
利伐沙班。此外,本发明还涉及使用所述的新型中间体通过与5-
氯硫吡嗪羰基
氯反应形成式(B)的
利伐沙班衍
生物的制备方法。所得到的式(B)进一步经过酸处理可形成
利伐沙班。