Hydrochloric Acid → 5-Fluoro-4-iodopyridin-2-ol

Participants

Reaction Steps

Concentrated HCl (50 mL) was added to a mixture of 2,5-difluoro-4-iodopyridine (2.0 g, 8.3 mmol) in 1,4-dioxane (350 mL) and water (100 mL). The mixture was heated to reflux and stirred at this temperature overnight. The reaction was concentrated to dryness and the residue was triturated in water (20 mL). The solids were collected via filtration and washed with water (2×30 mL) and hexanes (3×30 mL). The solid was dried under vacuum to afford the title compound as a yellow solid (1.0 g, 50%). MS (LCMS) m/z 240.0 (M+1). 1H NMR (400 MHz, DMSO-d6) δ ppm 7.02 (d, J=5.07 Hz, 1 H) 7.68 (d, J=2.34 Hz, 1 H) 11.50 (br. s., 1 H).

Provenance & Evidence