2-Nitro-4-(trifluoromethyl)benzoic acid → 4-(Trifluoromethyl)anthranilic acid

Participants

Reaction Steps

250 g of 2-nitro-4-trifluoromethylbenzoic acid (1.06 mol) were dissolved in 1 l of EtOH and 7.5 g of Pd/C (5%) were added. The mixture was hydrogenated under 1-2.5 bar of hydrogen pressure. During the hydrogen uptake, the temperature rose temporarily from 10° C. to 104° C. After 2 h, the hydrogen uptake was complete. Subsequently, the catalyst was filtered off and the solvent was removed under reduced pressure to obtain 215 g (99%) of a pale yellow solid, mp 174-176° C.

Provenance & Evidence