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:
Dec. 29, 1992
Filed:
Mar. 24, 1992
Applicant:
Inventor:
Freimund Rohrscheid, Kelkheim, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562414 ; 562416 ;
Abstract
A process for the preparation of alkanesulfonylbenzoic acids from alkanesulfonylalkylbenzenes of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and are alkyl having 1 to 4 carbon atoms, but R.sup.2 has a meaning other than t-butyl, and X is H, F, Cl, Br or NO.sub.2, using molecular oxygen in acetic acid and/or propionic acid in the presence of a catalyst containing cobalt and bromine ions and, in particular when the meaning of R.sup.2 is other than methyl, also manganese ions, which is additionally carried out in the presence of metal ions of Main Group 2 and/or 3.