1252018-07-7Relevant articles and documents
Preparation method of Rivaroxaban intermediates
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, (2019/01/08)
The invention discloses a preparation method of Rivaroxaban intermediates. The invention relates to a green and efficient preparation method of 4-(4-aminophenyl)morpholinyl-3-one and an amino protected derivative thereof. A structure of a formula II is obtained through an oxidation reaction of a structure of a formula II, and a structure of a formula I can be obtained through a deprotection reaction of the structure of the formula II, wherein the compound I and the compound II are both important intermediates for synthesizing the anticoagulation drug Rivaroxaban. Potassium permanganate is usedas an oxidizing agent in the oxidation reaction, tetraethyl benzyl ammonium chloride (TEBAC) is used as a phase transfer catalyst, dichloromethane is used as a solvent, and the reaction temperature in the oxidation reaction is 15-55 DEG C. The invention provides the preparation method of the Rivaroxaban intermediates, and the preparation method has the advantages that the raw materials are cheapand easily available, the reactions are mild in condition and are easy to operate, the preparation method is green and is friendly to the environment, the intermediate products and the final product are easy to purify, the total yield is high, industrial production is easy to realize, and the preparation method is effective and practical.
Processes for the preparation of rivaroxaban and intermediates thereof
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Page/Page column 39, (2010/11/03)
This invention provides a process for the preparation of S-Rivaroxaban and/or R-Rivaroxaban comprising reacting, in the presence of a first base, a compound of Formula 9: with a compound of Formula 8: