Process for preparing 2-cyano-3-hydroxy-N-(phenyl)but-2-enamides
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United States of America Patent
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May 17, 2005
Grant Date -
Sep 23, 2004
app pub date -
Mar 17, 2004
filing date -
Mar 18, 2003
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Abstract
A process is described for producing 2-cyano-3-hydroxy-N-(phenyl)but-2-enamide, in which a phenyl-substituted 2-cyano-N-(phenyl)acetamide is reacted in the presence of a base, acetic anhydride and at least one solvent, and the resultant 2-cyano-3-hydroxy-N-(phenyl-derivative)but-2-enamide is crystallized by acidification.
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