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Process for the preparation of 4-amino-5-fluoro-3-chloro-6-(substituted)picolinates
专利权人:
DOW AGROSCIENCES LLC
发明人:
RENGA JAMES M.,GIAMPIETRO NATALIE C.
申请号:
NZ70870013
公开号:
NZ708700A
申请日:
2013.12.12
申请国别(地区):
NZ
年份:
2016
代理人:
摘要:
4-Amino-5-fluoro-3-chloro-6-(substituted)picolinates are prepared from trifluoroacetic acid, p-methoxyaniline, a C1-C4 alkyl propiolate 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.
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中国工程科技知识中心
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