Sodium Hydroxide → 4,5-Difluoro-2-hydroxybenzoic acid

Participants

Reaction Conditions

Reaction Steps

1.76 g (0.01 mole) of 2,4,5-trifluorobenzoic acid, 1.62 g (0.04 mole) of powdery 99% sodium hydroxide and 20 ml of 1,3-dimethyl-2-imidazolidinone were fed into a 100-ml four-necked flask provided with a thermometer, a stirrer and a reflux condenser. The mixture was stirred at 130° C. for 3 hours to give rise to a reaction. Then, the same post-treatment as in Example 1 was conducted to obtain 0.50 g of 4,5-difluorosalicylic acid. The isolated yield was 28.7% relative to the 2,4,5-trifluorobenzoic acid used.

Provenance & Evidence