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:
Apr. 25, 2006
Filed:
Nov. 27, 2000
Roland Götz, Neulussheim, DE;
Norbert Götz, Worms, DE;
Michael Keil, Freinsheim, DE;
Bernd Wolf, Fussgönheim, DE;
Adrian Steinmetz, Mannheim, DE;
Armin Stamm, Mainz, DE;
Jochem Henkelmann, Mannheim, DE;
Roland Götz, Neulussheim, DE;
Norbert Götz, Worms, DE;
Michael Keil, Freinsheim, DE;
Bernd Wolf, Fussgönheim, DE;
Adrian Steinmetz, Mannheim, DE;
Armin Stamm, Mainz, DE;
Jochem Henkelmann, Mannheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to a method for producing o-chloromethyl benzoic acid chlorides of formula (I), in which Rto Rcan be the same or different and represent hydrogen C–Calkyl, halogen or trifluoromethyl, by reaction benzo condensed lactones of formula (II), in which Rto Rhave the above-mentioned meaning, with thionyl chloride. The inventive method is characterized in that the reaction is carried out in the presence of catalytic quantities of a Lewis acid and in the presence of catalytic quantities of a phosphine derivative.