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. 19, 2013
Filed:
Apr. 30, 2009
Thomas Zierke, Böhl-Iggelheim, DE;
Volker Maywald, Ludwigshafen, DE;
Michael Rack, Eppelheim, DE;
Sebastian Peer Smidt, Oftersheim, DE;
Michael Keil, Freinsheim, DE;
Bernd Wolf, Fuβgönheim, DE;
Christopher Koradin, Ludwigshafen, DE;
Thomas Zierke, Böhl-Iggelheim, DE;
Volker Maywald, Ludwigshafen, DE;
Michael Rack, Eppelheim, DE;
Sebastian Peer Smidt, Oftersheim, DE;
Michael Keil, Freinsheim, DE;
Bernd Wolf, Fuβgönheim, DE;
Christopher Koradin, Ludwigshafen, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for preparing 2-(aminomethylidene)-4,4-dihalo-3-oxobutyric esters of the formula (I), wherein R, R, Rare C-C-alkyl, C-C-haloalkyl, C-C-alkenyl, C-C-cycloalkyl or benzyl, and/or Rtogether with Rand the nitrogen atom to which the two radicals are attached are a heterocyclic radical, in which a corresponding 3-aminoacrylic ester is reacted with a halogen-substituted acetyl fluoride in the presence of at least one alkali or alkaline earth metal fluoride; and the further conversion of halogen-substituted 2-(aminomethylidene)-3-oxobutyric esters of the formula (I) to halomethyl-substituted pyrazol-4-ylcarboxylic acids and their esters.