[EN] PROCESS FOR THE PREPARATION OF 4-AMINO-5-FLUORO-3-HALO-6-(SUBSTITUTED)PICOLINATES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 4-AMINO-5-FLUORO-3-HALOGÉNO-6-(SUBSTITUÉ)PICOLINATES
申请人:DOW AGROSCIENCES LLC
公开号:WO2012103045A1
公开(公告)日:2012-08-02
4-Amino-5-fluoro-3-halo-6-(substituted)picolinates are conveniently prepared from 4,5,6-trichloropicolinonitrile by a series of steps involving fluorine exchange, amination, halogen exchange, halogenation, nitrile hydrolysis, esterification, and transition metal assisted coupling.