[EN] PROCESS FOR THE PREPARATION OF 4-AMINO-5-FLUORO-3-CHLORO-6-(SUBSTITUTED)PICOLINATES<br/>[FR] PROCÉDÉ D'ÉLABORATION DE PICOLINATES (ÉVENTUELLEMENT SUBSTITUÉS) EN 4-AMINO-5-FLUORO-3-CHLORO-6
申请人:DOW AGROSCIENCES LLC
公开号:WO2014093588A1
公开(公告)日:2014-06-19
4-Amino-5-fIuoro-3 -chloro-6-( substituted)picolinates are prepared from trifluoroacetic acid, p-methoxyaniline, a 3,3-dialkoxyprop-1-yne and a substituted methylene amine by a series of steps. In particular, provided herein are processes for the preparation of 4-amino-5-fluoro-3-chloro-6-(substituted)picolinates from a non-pyridine source without a metal assisted coupling and without fluorination with an expensive fluorinating agent. These picolinates are useful as herbicides.