2-Fluoro-4-nitrophenol → Phenol, 4-amino-2-fluoro-

To a degassed solution of 4-nitro-2-fluorophenol (3) (16 g, 102 mmol) in MeOH (150 mL) was added palladium on charcoal (10%) Degussa type (3.0 g, 2.82 mmol). The mixture was stirred at r.t. under hydrogen atmosphere for 3 h, filtered through a celite pad and evaporated under reduced pressure. The residue was triturated with Et2O (50 mL) to afford compound 4 (11.264 g, 87% yield) as a dark-brown solid. MS (m/z): 128.1 (M+H). 1H NMR (400 MHz, DMSO-d6) δ (ppm): 8.57 (s, 1H), 6.62 (dd, J=10.0, 8.4 Hz, 1H), 6.34 (dd, J=13.4, 2.6 Hz, 1H), 6.20 (ddd, J=8.6, 2.6, 1.2 Hz, 1H), 4.67 (s, 2H).

1. filtrationfiltered through a celite pad
2. customevaporated under reduced pressure
3. customThe residue was triturated with Et2O (50 mL)

ORD record

ord-d68570c130294a78811a887254c283ac

Source dataset

uspto-grants-2014_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08907091B2