PROCESS FOR THE PREPARATION OF 4-AMINO-3-CHLORO-5-FLUORO-6-(SUBSTITUTED) PICOLINATES
申请人:Zhu Yuanming
公开号:US20120190858A1
公开(公告)日:2012-07-26
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
氯吡啶腈制备,其中包括
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。