发明公开
EP1165520A1 VERFAHREN ZUR HERSTELLUNG VON 4-AMINO-5-CHLOR-1-PHENYLPYRIDAZINON-(6)
有权
用于生产4-氨基-5-氯-1- PHENYLPYRIDAZINON
- 专利标题： VERFAHREN ZUR HERSTELLUNG VON 4-AMINO-5-CHLOR-1-PHENYLPYRIDAZINON-(6)
- 专利标题（英）： Method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6)
- 专利标题（中）： 用于生产4-氨基-5-氯-1- PHENYLPYRIDAZINON
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申请号： EP00912664.0申请日： 2000-03-30
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公开(公告)号： EP1165520A1公开(公告)日： 2002-01-02
- 发明人: MERKLE, Hans, Rupert , HERBIG, Klaus , FRETSCHNER, Erich , FRÖHLICH, Helmut
- 申请人： BASF AKTIENGESELLSCHAFT
- 申请人地址： 67056 Ludwigshafen DE
- 专利权人： BASF AKTIENGESELLSCHAFT
- 当前专利权人： BASF AKTIENGESELLSCHAFT
- 当前专利权人地址： 67056 Ludwigshafen DE
- 代理机构： Kinzebach, Werner, Dr.
- 优先权： DE19914722 19990331
- 国际公布： WO0059891 20001012
- 主分类号： C07D237/22
- IPC分类号： C07D237/22
摘要：
The invention relates to a method for producing 4-amino-5-chloro-1-phenyl pyridazinone-(6) by reacting 4,5-dichloro-1-phenyl pyridazinone-(6) with aqueous ammonia in the presence of a catalyst. According to the invention, a catalyst is used which is soluble in the aqueous alkaline reaction medium but which is, however, essentially insoluble in the reaction mixture that is acidically regulated after the 4-amino-5-chloro-1-phenyl pyridazinone-(6) has been removed. The inventive method makes it possible, in a simple manner, to recover and reuse the catalyst.
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