Process for the preparation of 4-amino-3-chloro-5-fluoro-6-(substituted) picolinates
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Abstract
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.
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1 Claim
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1. A compound of the formula
Specification