Process for the preparation of alkanesulfonylbenzoic acids

Details Process for the preparation of alkanesulfonylbenzoic acids Process for the preparation of alkanesulfonylbenzoic acids

C - Chemistry, Metallurgy

07

C

C07C 315/04 (2006.01) C07C 317/44 (2006.01)

Patent

CA 2053860

Process for the preparation of alkanesulfonyl-benzoic acids, characterized in that alkanesulfonyl-alkyl- benzenes of the formula (see formula I) in which R1 and R2 are identical or different and are alkyl having 1 to 4 carbon atoms, but R2 has a meaning other than t-butyl, and X represents H, F, Cl, Br or NO2, are oxidized under increased pressure at temperatures above 120°C with molecular oxygen in acetic and/or propionic acid in the presence of a catalyst soluble therein, which contains cobalt ions and bromine ions and, if R2 has a meaning other than methyl, also manganese ions.

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