Zhu, Yuanming,Whiteker, Gregory T.,Arndt, Kim E.,Renga, James M.,Froese, Robert D.
申请号：
AU2012209280
公开号：
AU2012209280A1
申请日:
2012.01.24
申请国别(地区):
AU
年份:
2013
代理人:
摘要：
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.
