发明授权
US06894184B2 Process for preparing 2-cyano-3-hydroxy-N-(phenyl)but-2-enamides 有权
制备2-氰基-3-羟基-N-(苯基)丁-2-烯酰胺的方法

Process for preparing 2-cyano-3-hydroxy-N-(phenyl)but-2-enamides
摘要:
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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