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.
4-氨基-5-氟-3-卤代-6-(取代基)吡啶酸酯可以方便地从4,5,6-三氯吡啶甲腈通过一系列步骤制备,其中包括氟交换、胺化、卤素交换、卤化、腈水解、酯化和过渡金属辅助偶联。