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. 20, 2012
Filed:
Apr. 30, 2009
Thomas Zierke, Boehl-Iggelheim, DE;
Volker Maywald, Ludwigshafen, DE;
Michael Rack, Eppelheim, DE;
Sebastian Peer Smidt, Oftersheim, DE;
Michael Keil, Freinsheim, DE;
Bernd Wolf, Fussgoenheim, DE;
Christopher Koradin, Ludwigshafen, DE;
Thomas Zierke, Boehl-Iggelheim, DE;
Volker Maywald, Ludwigshafen, DE;
Michael Rack, Eppelheim, DE;
Sebastian Peer Smidt, Oftersheim, DE;
Michael Keil, Freinsheim, DE;
Bernd Wolf, Fussgoenheim, DE;
Christopher Koradin, Ludwigshafen, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for preparing difluoromethyl-substituted pyrazol-4-ylcarboxylic acids and their esters, 2-(aminomethylidene)-4,4-difluoro-3-oxobutteric esters of the formula (I) in which R, Rand Rindependently of one another are C-C-alkyl, C-C-haloalkyl, C-C-alkenyl, C-C-cycloalkyl or benzyl or NRRis a 5- to 10-membered heterocyclic radical, to a process for preparing compounds of the formula (I) wherein an appropriate 3-aminoacrylic ester is reacted with difluoroacetyl fluoride and to the use of compounds of the formula (I) in the process for preparing difluoromethyl-substituted pyrazol-4-ylcarboxylic acids and their esters.