The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2019
Filed:
Dec. 06, 2017
Method of preparing benzyl 4-amino-3-chloro-5-fluoro-6-(4-chloro-2-fluoro-3-methoxyphenyl)picolinate
Applicant:
Dow Agrosciences Llc, Indianapolis, IN (US);
Inventors:
Jason S. Fisk, Freeland, MI (US);
David J. Couling, Midland, MI (US);
Abraham D. Schuitman, Midland, MI (US);
Megan E. Donaldson, Linwood, MI (US);
Brian Murdoch, Midland, MI (US);
Ronald B. Leng, Midland, MI (US);
Assignee:
Dow AgroSciences LLC, Indianapolis, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 9/00 (2006.01); C07B 39/00 (2006.01); C07B 43/04 (2006.01); C07D 213/61 (2006.01); C07D 213/72 (2006.01); C07D 213/127 (2006.01); C07D 213/803 (2006.01);
U.S. Cl.
CPC ...
C07D 213/127 (2013.01); B01D 9/00 (2013.01); B01D 9/005 (2013.01); C07B 39/00 (2013.01); C07B 43/04 (2013.01); C07D 213/61 (2013.01); C07D 213/72 (2013.01); C07D 213/803 (2013.01);
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.