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. 24, 2009
Filed:
Jul. 14, 2004
Matthias Maase, Speyer, DE;
Gerhard Bertlein, Nechargemuend, DE;
Holger Ganz, Ludwigshafen, DE;
Matthias Dust, Ludwigshafen, DE;
Matthias Maase, Speyer, DE;
Gerhard Bertlein, Nechargemuend, DE;
Holger Ganz, Ludwigshafen, DE;
Matthias Dust, Ludwigshafen, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing mono- or poly-C-C-alkyl- and/or -halogen-substituted arylcarbonyl chlorides (I), by, in a first stage, reacting a mono- or poly-C-C-alkyl- and/or -halogen-substituted aromatic (II) with CClin the presence of a Friedel-Crafts catalyst to give the corresponding mono- or poly-C-C-alkyl- and/or -halogen-substituted trichloromethylated aromatic (III), and, in a second stage, treating the trichloromethylated aromatic (III) with water or a protic acid in the presence of a catalyst to obtain the arylcarbonyl chloride (I). In a particularly preferred embodiment, the trichloromethylated aromatic (III) is not isolated as an intermediate and is used in the second stage dissolved in the solvent of the first stage.