The present invention relates to the novel key intermediate, 4-4-[(5S)-(Aminomethyl)-2- oxo-l,3-oxazolidin-3-yl]-phenyl}-morpholin-3-one perchlorate, in the synthesis of rivaroxaban. The invention further relates to the crystalline form of novel intermediate, the process to prepare the novel intermediate and method of preparing rivaroxaban using this novel intermediate. The invention provides an improved and efficient process for preparation of Rivaroxaban.
本发明涉及一种新型关键中间体,即4-4-[(5S)-(
氨甲基)-2-氧代-1,3-
噁唑烷-3-基]-苯基}-吗啉-3-酮
高氯酸盐,在利伐罗班合成中的应用。该发明还涉及该新型中间体的晶体形式,制备该新型中间体的方法以及利用该新型中间体制备利伐罗班的方法。该发明提供了一种改进和高效的利伐罗班制备方法。