Patent · US Active

Process for the preparation of 4-amino-5-fluoro-3-halo-6-(substituted)picolinates

US8754231B2 · kind B2 · utility

0Cited by

8References

2Claims

0Family size

Assignee

DOW AGROSCIENCES LLC · US

Inventors

Yuanming Zhu · Carmel, US
Gregory T. Whiteker · Carmel, US
James M. Renga · Midland, US
Kim E. Arndt · Carmel, US
Gary Roth · Midland, US
David E. Podhorez · Midland, US
Scott P. West · Midland, US

Key dates

Filing date	Jan 24, 2012
Grant date	Jun 17, 2014
Priority date	—
Expiry date	Jan 24, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D213/803
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

4-Amino-5-fluoro-3-halo-6-(substituted)picolinates are conveniently prepared from 4,5,6-trichloropicolinonitrile by a series of steps involving fluorine exchange, amination, halogen exchange, halogenation, nitrile hydrolysis, esterification, and transition metal assisted coupling.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.