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US 9,518,019 B2Granted
Process for the preparation of 4-amino-5-fluoro-3-chloro-6-(substituted)picolinates
AssigneeDow AgroSciences LLC
InventorsNatalie C. Giampietro, James M. Renga
Life of this patent
Estimating the term…
Abstract
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.
Claims2
A compound of Formula E
- wherein
- R1 represents C1-C4 alkyl, cyclopropyl, C2-C4 alkenyl or phenyl substituted with from 1 to 4 substituents independently selected from halogen, C1-C4 alkyl, C1-C4 haloalkyl, C1-C4 alkoxy or C1-C4 haloalkoxy, and
- R2 represents C1-C4 alkyl.
A compound of Formula G
- wherein
- R1 represents C1-C4 alkyl, cyclopropyl, C2-C4 alkenyl or phenyl substituted with from 1 to 4 substituents independently selected from halogen, C1-C4 alkyl, C1-C4 haloalkyl, C1-C4 alkoxy or C1-C4 haloalkoxy, and
- R2 represents C1-C4 alkyl.
Dependencies are inferred from the claim text.