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
- 专利标题: Process for preparing 2-cyano-3-hydroxy-N-(phenyl)but-2-enamides
- 专利标题(中): 制备2-氰基-3-羟基-N-(苯基)丁-2-烯酰胺的方法
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申请号: US10802583申请日: 2004-03-17
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公开(公告)号: US06894184B2公开(公告)日: 2005-05-17
- 发明人: Jochen Hachtel , Bernd Neises , Wilfried Schwab , Roland Utz , Martin Zahn
- 申请人: Jochen Hachtel , Bernd Neises , Wilfried Schwab , Roland Utz , Martin Zahn
- 申请人地址: DE Frankfurt am Main
- 专利权人: Aventis Pharma Deutschland GmbH
- 当前专利权人: Aventis Pharma Deutschland GmbH
- 当前专利权人地址: DE Frankfurt am Main
- 代理商 Ronald G. Ort
- 优先权: DE10311763 20030318
- 主分类号: A61K31/277
- IPC分类号: A61K31/277 ; C07C253/30 ; C07C255/23 ; C07C255/07
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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