Hydrochloric Acid → HCID 23364083, compound

Participants

Reaction Steps

To a suspension of magnesium (4.2 g) in THF (20 ml) was added iodine (catalytic amount) while stirring at room temperature under argon atmosphere. To the mixture was then added dropwise a solution of 1-bromo-4-fluorobenzene (22.8 g) in THF (60 ml), and the mixture was stirred for 30 minutes. The mixture was added dropwise, while stirring at room temperature, to a solution of 2,3-pyrazinedicarboxylic anhydride (20.0 g) in THF (100 ml), followed by stirring for one hour. The reaction mixture was poured into dilute HCl (adjusting the pH to 4 to 5), followed by extraction with ethyl acetate. The extract solution was washed with water and dried, then the solvent was distilled off to give 3-(4-fluorobenzoyl)-2-pyrazinecarboxylic acid as a colorless oily product (25.8 g).

Provenance & Evidence