Patent · US Active

Method of preparing benzyl 4-amino-3-chloro-5-fluoro-6-(4-chloro-2-fluoro-3-methoxyphenyl)picolinate

US10407391B2 · kind B2 · utility

0Cited by

1References

18Claims

0Family size

Assignee

DOW AGROSCIENCES LLC · US

Inventors

Jason S. Fisk · Freeland, US
David J. Couling · Midland, US
Abraham D. Schuitman · Midland, US
Megan E. Donaldson · Midland, US
Brian Murdoch · Midland, US
Ronald B. Leng · Midland, US

Key dates

Filing date	Dec 6, 2017
Grant date	Sep 10, 2019
Priority date	—
Expiry date	Dec 6, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D213/803
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method of preparing benzyl 4-amino-3-chloro-5-fluoro-6-(4-chloro-2-fluoro-3-methoxyphenyl)picolinate (I) from benzyl 4,5-difluoro-6-(4-chloro-2-fluoro-3-methoxyphenyl)picolinate (II) is described. The method includes the use of amination and chlorination process steps to provide the compound of Formula I.

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