367453-00-7Relevant academic research and scientific papers
METHOD FOR CLEANING 3-HYDROXYAMIDINOPHENYLALANINE DERIVATIVES BY THE PRECIPITATION AND RECRYSTALLISATION OF A SALT AND AN AROMATIC SULPHONIC ACID
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Page/Page column 11-12, (2008/06/13)
The invention relates to a method for cleaning 3-hydroxyamidinophenylalanine derivatives comprising the steps: (a) addition of an aromatic sulphonic acid to a solution of an optionally contaminated 3-hydroxyamidinophenylalanine derivative in order to form a precipitate; (b) separation of the precipitate formed in step (a); and (c) recovery of the free 3-hydroxyamidinophenylalanine derivative from the precipitate. 3-hydroxyamidinophenylalanine derivatives can e.g. be used as urokinase inhibitors. The invention also relates to the use of highly pure 3-hydroxyamidinophenylalanine derivatives for producing 3-amidinophenylalanine derivatives.
