42823-46-1Relevant articles and documents
Preparation method and application of Nafamostat mesylate intermediate
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Paragraph 0047-0051, (2019/10/23)
The invention belongs to the field of intermediate preparation and particularly relates to a preparation method and the application of a Nafamostat mesylate intermediate. The preparation method of theNafamostat mesylate intermediate comprises the step of enabling o/p-aminobenzoic acids to react with cyanamide under the action of a catalyst in a solvent, wherein the catalyst is hydrochloric acid ethanol or hydrochloric acid methanol and preferably selects the hydrochloric acid ethanol. The invention further provides a method for further preparing a Nafamostat mesylate impurity standard productby utilizing the method. With the adoption of the preparation method of the Nafamostat mesylate intermediate, the reaction time is shortened, the reaction yield is improved, and the production cost and the storage pressure are reduced. Therefore, implementation values and social economic benefits are greater. Moreover, impurities in the Nafamostat mesylate production are qualitatively and quantitatively analyzed by the impurity standard product, so that the quality standard of the product can be improved, and an important guiding significance is provided for safe medication.
Cleavage of 2-(Arylamino)-4,6-dimethoxypyrimidines to yield arylguanidines
Shaw, Julian W.,Grayson, David H.,Rozas, Isabel
, p. 3565 - 3569 (2014/06/23)
A novel method for the synthesis of aryl-substituted guanidines in good overall yields is presented; it consists of the acidic cleavage of 2-(arylamino)-4,6-dimethoxypyrimidines, which were prepared by coupling aryl bromides with 2-amino-4,6-dimethoxypyrimidine. This methodology introduces a new means of protection for the guanidine functionality. Copyright
Methods and compositions for treating or preventing bacterial infection
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, (2008/06/13)
The invention relates to compositions and methods for treating or preventing disease or disorders caused by or associated with certain bacterial infection, especially Escherichia coli (E. coli) or Helicobacter pylori (H. pylori) infection.