发明授权
- 专利标题: Process for the preparation of 2,3-dihalogenoquinoxalines
- 专利标题(中): 2,3-二卤代喹喔啉的制备方法
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申请号: US561217申请日: 1995-11-21
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公开(公告)号: US5777119A公开(公告)日: 1998-07-07
- 发明人: Jens Uwe Zarnack , Bernd Diesselkamper , Wolfgang Lorenz , Jorg-Michael Borchers
- 申请人: Jens Uwe Zarnack , Bernd Diesselkamper , Wolfgang Lorenz , Jorg-Michael Borchers
- 申请人地址: DEX Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DEX Leverkusen
- 优先权: DEX4313586.2 19930426
- 主分类号: C07D241/44
- IPC分类号: C07D241/44 ; C09B62/36
摘要:
Quinoxalines are prepared by reaction of oxalic acid with an o-phenylenediamine, halogenation in the presence of a solvent and oxidation to a quinoxaline carboxylic acid derivative.
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