4-Amino-2,5-difluorophenol

868736-12-3

120103-19-7

1-(Benzyloxy)-2,5-difluoro-4-nitrobenzene (9.21 g) was dissolved in methanol (300 ml) and 10% palladium-carbon catalyst (921 mg) was added. The reaction was stirred at room temperature for 24 hours and 20 minutes under hydrogen atmosphere. Upon completion of the reaction, the atmosphere in the reaction vessel was replaced with nitrogen to terminate the reaction and the catalyst was removed by filtration through diatomaceous earth. The filtrate was concentrated under reduced pressure to afford the title compound 4-amino-2,5-difluorophenol as a brown solid (4.96 g, 99% yield). The product was characterized by 1H-NMR (DMSO-d6): δ 4.67 (1H, s), 6.53-6.64 (1H, m), 9.03 (1H, s).