446292-07-5Relevant articles and documents
Preparation method of rivaroxaban intermediate
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, (2020/05/02)
The invention provides a preparation method of a rivaroxaban intermediate. The preparation method comprises: (1) carrying out a reaction on a compound A and a compound B in an alcohol or an alcohol aqueous solution to obtain a compound C; and (2) reacting the compound C with N,N'-carbonyldiimidazole in a reaction solvent selected from acetonitrile or butyronitrile to obtain a reaction solution containing a compound D, and performing cooling crystallization to obtain a compound D.
Preparation method of 4-(4-aminophenyl)morpholin-3-one derivative
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Paragraph 0042; 0045, (2020/09/30)
The invention belongs to the technical field of medicines, and particularly relates to a preparation method of a 4-(4-aminophenyl)morpholin-3-one derivative. The preparation method comprises the following steps: reacting 4-(4-aminophenyl)morpholin-3-one serving as a raw material with a first reactant to obtain a first intermediate product; and in a first solvent and with the first intermediate product as a raw material, adding (S)-N-(2,3-epoxypropyl)phthalimide in batches in multiple times, and carrying out a reaction at a first temperature to obtain a target product, namely the 4-(4-aminophenyl)morpholin-3-one derivative. According to the method, the solvent is optimized, so a conversion rate is improved; the mode of feeding in batches in multiple times and a post-treatment mode (concentration, crystallization, filtration, drying and the like) are used, so the target product with high yield is obtained; and the target product is the 4-(4-aminophenyl)morpholin-3-one derivative, and the method has important significance in effectively controlling the quality of rivaroxaban.
Preparation method and use of rivaroxaban intermediate
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Paragraph 0020; 0021; 0022; 0023; 0024-0027, (2019/04/26)
The present invention relates to a preparation method of a rivaroxaban intermediate I. The method provided by the invention has the advantages of greatly shortening the reaction time, easy preparationby scale, simple operation, good stability, high purity, low environmental pollution and suitable for industrial production.