The present invention relates to a process for the preparation of Rivaroxaban and its novel intermediates, or pharmaceutically acceptable salts thereof. The present invention provides novel intermediates, which may be useful for the preparation of Rivaroxaban or its pharmaceutically acceptable salts thereof. The process of preparation by using novel intermediate is very simple cost effective and may be employed at commercial scale. The product obtained by using novel intermediate yield the Rivaroxaban of purity 99% or more, when measured by HPLC. The present invention especially relates to a process for the preparation of Rivaroxaban from thioester of formula II, or a pharmaceutically acceptable salt thereof, wherein R is leaving group.
本发明涉及一种用于制备
利伐沙班及其新型中间体或其药学上可接受的盐的过程。本发明提供了新型中间体,可用于制备
利伐沙班或其药学上可接受的盐。使用新型中间体的制备过程非常简单,成本效益高,可在商业规模上应用。使用新型中间体得到的产品,其纯度可通过HPLC测量达到99%或更高。本发明特别涉及一种从公式II的
硫代酯或其药学上可接受的盐制备
利伐沙班的过程,其中R是离去基团。