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:
Feb. 14, 2012
Filed:
Nov. 02, 2007
Martin Sukopp, Mannheim, DE;
Michael Rack, Eppelheim, DE;
Sebastian Peer Smidt, Mannheim, DE;
Sandra Löhr, Ludwigshafen, DE;
Michael Keil, Freinsheim, DE;
Jochen Dietz, Mannheim, DE;
Joachim Rheinheimer, Ludwigshafen, DE;
Thomas Grote, Wachenheim, DE;
Thomas Zierke, Böhl-Iggelheim, DE;
Jan Klaas Lohmann, Ludwigshafen, DE;
Martin Sukopp, Mannheim, DE;
Michael Rack, Eppelheim, DE;
Sebastian Peer Smidt, Mannheim, DE;
Sandra Löhr, Ludwigshafen, DE;
Michael Keil, Freinsheim, DE;
Jochen Dietz, Mannheim, DE;
Joachim Rheinheimer, Ludwigshafen, DE;
Thomas Grote, Wachenheim, DE;
Thomas Zierke, Böhl-Iggelheim, DE;
Jan Klaas Lohmann, Ludwigshafen, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for preparing difluoromethyl-substituted pyrazol-4-ylcarboxylates of the formula I in which in which X is fluorine, chlorine or bromine, Rhas one of the meanings given above and Ris C-C-alkyl, C-C-cycloalkyl, C-C-alkenyl, benzyl or phenyl, is reacted with a silane compound of the general formula RSiClin which n is 1, 2 or 3 and the substituents Rare independently of one another selected from the group consisting of C-C-alkyl and phenyl and with a metal selected from the metals of groups 1, 2, 3, 4 and 12 of the Periodic Table of the Elements having a redox potential of less than −0.7 V, based on a normal hydrogen electrode (at 25° C. and 101.325 kPa); and