发明授权
- 专利标题： Process for producing 4-benzoylpyrazoles
- 专利标题（中）： 生产4-苯甲酰基吡唑的方法
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申请号： US400025申请日： 1982-07-20
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公开(公告)号： US4415739A公开(公告)日： 1983-11-15
- 发明人: Takahiro Haga , Tetsuji Nishikawa , Toshio Nakajima , Kohji Minamida , Masaru Maeda
- 申请人： Takahiro Haga , Tetsuji Nishikawa , Toshio Nakajima , Kohji Minamida , Masaru Maeda
- 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： JPX56-121691 19810803; JPX57-100434 19820611
- 主分类号： C07D231/20
- IPC分类号： C07D231/20
摘要：
4-Benzoyl-5-hydroxypyrazoles useful as herbicidal active ingredients, their intermediate or stabilizers against heat, oxidation or ultraviolet light are produced by a condensation of a pyrazolone, tetrachloromethane and a benzene compound in the presence of an aluminium halide, followed by a hydrolysis reaction with industrial advantages.