[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-HALO-6-PICOLINATES (SUBSTITUÉS)
申请人:DOW AGROSCIENCES LLC
公开号:WO2014018502A1
公开(公告)日:2014-01-30
Provided herein are processes for the preparation of 4-amino-5-fluoro-3-halo-6-(substituted)picolinates comprising a step of converting chloropicolinoyl chlorides to fluoropicolinoyl fluorides.
Process for the preparation of 4-amino-5-fluoro-3-halo-6-(substituted)picolinates
申请人:Dow AgroSciences LLC
公开号:US08993772B2
公开(公告)日:2015-03-31
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.