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:
Jan. 18, 2005
Filed:
Oct. 03, 2002
Lars Bierer, Liederbach, DE;
Joachim Ritzer, Rodenbach, DE;
Berthold Schiemenz, Frankfurt am Main, DE;
Thomas Wessel, Niederdorfelden, DE;
Lars Bierer, Liederbach, DE;
Joachim Ritzer, Rodenbach, DE;
Berthold Schiemenz, Frankfurt am Main, DE;
Thomas Wessel, Niederdorfelden, DE;
Clariant GmbH, Frankfurt, DE;
Abstract
The present invention relates to a process for preparing substituted benzoyl chlorides of the formula (1)where R, x and y have the meaning given below, which comprises reacting a benzaldehyde of the formula (2)where R, independently of each other, is identical or different and is an unsubstituted phenyl radical or a phenyl radical that is substituted by halogen, NO, CN, (C-C)alkyl or (C-C)alkoxy, or is halogen, NO, CN, NR', OR′, SOR′, SOOR′, COR′ or COR′, where R′ is an unbranched or branched C-Calkyl radical, an unsubstituted phenyl radical or a phenyl radical which is substituted by halogen, NO, CN, (C-C)alkyl or (C-C)alkoxy, x is 1 or 2 and y is 1, 2 or 3, with a chlorinating agent in the presence of a free-radical initiator and a solvent at from −20 to +200° C.