3-Hydroxyanthranilic Acid → 2-Phenylbenzoxazole-4-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

Benzoic acid (122 mg, 1.0 mmol) and 3-hydroxyanthranilic acid (153 mg, 1.0 mmol) were added to PPA (1 g), the mixture was stirred at 180° C. for 2 hr. After cooled to room temperature, water (50 mL) was added and filtered; the cake was washed with water and dried in vacuum to obtain 2-phenylbenzo[d]oxazole-4-carboxylic acid. LC-MS (ESI) m/z 240 [M+1]+.

Provenance & Evidence