发明授权
- 专利标题: Process for producing chloronicotinic acid compounds
- 专利标题(中): 制备氯烟酸化合物的方法
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申请号: US482535申请日: 1983-04-06
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公开(公告)号: US4504665A公开(公告)日: 1985-03-12
- 发明人: Takahiro Haga , Tohru Koyanagi , Toshio Nakajima , Takeshi Ohshima
- 申请人: Takahiro Haga , Tohru Koyanagi , Toshio Nakajima , Takeshi Ohshima
- 申请人地址: JPX Osaka
- 专利权人: Ishihara Sangyo Kaisha Ltd.
- 当前专利权人: Ishihara Sangyo Kaisha Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX57-60688 19820412; JPX57-156335 19820908
- 主分类号: C07D213/61
- IPC分类号: C07D213/61 ; C07D213/80 ; C07D213/55
摘要:
A chloronicotinic acid compound is prepared by hydrolyzing a 3-trichloromethyl pyridine compound in the presence of sulfuric acid or phosphoric acid. By this process, a highly pure chloronicotinic acid compound is obtainable in good yield. This compound is useful as an intermediate for medicines.
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