发明授权
- 专利标题： Process for the preparation of 4-amino-3-chloro-5-fluoro-6-(substituted)picolinates
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申请号： US14049645申请日： 2013-10-09
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公开(公告)号： US09598368B2公开(公告)日： 2017-03-21
- 发明人: Yuanming Zhu , Gregory T. Whiteker , Kim E. Arndt , James M. Renga , Robert D. J. Froese
- 申请人： Yuanming Zhu , Gregory T. Whiteker , Cynthia Arndt , James M. Renga , Robert D. J. Froese
- 申请人地址： US IN Indianapolis
- 专利权人： Dow AgroSciences LLC
- 当前专利权人： Dow AgroSciences LLC
- 当前专利权人地址： US IN Indianapolis
- 代理商 Michael R. Asam
- 主分类号： C07D213/79
- IPC分类号： C07D213/79 ; C07D213/84 ; C07D213/803 ; C07D213/807
摘要：
4-Amino-3-chloro-5-fluoro-6-(substituted)picolinates are conveniently prepared from 3,4,5,6-tetrachloropicolinonitrile by a series of steps involving fluorine exchange, amination, reaction with hydrazine, halogenation, hydrolysis and esterification, and transition metal assisted coupling.
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