The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2005
Filed:
Mar. 17, 2004
Applicants:
Jochen Hachtel, Frankfurt, DE;
Bernd Neises, Offenburg, DE;
Wilfried Schwab, Neuried, DE;
Roland Utz, Messel, DE;
Martin Zahn, Hofheim, DE;
Inventors:
Jochen Hachtel, Frankfurt, DE;
Bernd Neises, Offenburg, DE;
Wilfried Schwab, Neuried, DE;
Roland Utz, Messel, DE;
Martin Zahn, Hofheim, DE;
Assignee:
Aventis Pharma Deutschland GmbH, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C255/07 ;
U.S. Cl.
CPC ...
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.