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:
Nov. 05, 2024
Filed:
Oct. 10, 2018
Applicant:
Dow Agrosciences Llc, Indianapolis, IN (US);
Inventors:
Jossian Oppenheimer, Midland, MI (US);
Michael Gullo, Midland, MI (US);
David E. Podhorez, Midland, MI (US);
Justin A. Alberts, Midland, MI (US);
Assignee:
Corteva Agriscience LLC, , IN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A01N 43/90 (2006.01); C07D 487/04 (2006.01);
U.S. Cl.
CPC ...
C07D 487/04 (2013.01); A01N 43/90 (2013.01);
Abstract
The present disclosure concerns a method for preparing florasulam which involves treating a solution of 2,6-difluoroaniline in 1,2-propylene glycol with: a) sulfonyl chloride III and then b) a base to provide, after workup and isolation, florasulam (I) in yields of about 65-85%. The treatment of 2,6-difluoroaniline with sulfonyl chloride III and the base are conducted by controlled additions.