Process for the preparation of 4-amino-3-chloro-5-fluoro-6-(substituted) picolinates
申请人:Zhu Yuanming
公开号:US08609853B2
公开(公告)日:2013-12-17
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.
4-氨基-3-氯-5-氟-6-(取代基)吡啶酸盐可以通过一系列步骤方便地从3,4,5,6-四氯吡啶-2,5-二腈制备,包括氟交换,氨化,与肼反应,卤代反应,水解和酯化,以及过渡金属辅助偶联。