Bromine → HCID 57566613, compound

Participants

Reaction Steps

To a room temperature suspension of N-[2-(3-fluoro-pyridin-2-yl)-phenyl]-2,2-dimethyl-propionamide (˜77 mmoles) in acetic acid (300 mL) was added bromine (12 mL, 228 mmoles) as a solution in 50 mL of acetic acid over a 1 hour period. The heterogenous mixture was stirred at room temperature for 5 hours over which time a thick precipitate formed. The mixture was then poured over ice, diluted with 1N Na2S2O3 (500 mL), and stirred for 1 hour. The solids were filtered, re-suspended in water (2 L), stirred for 1 hour, then filtered and washed with water again. The resulting solids were pumped to dryness at 50° C., re-suspended in HOAc (400 mL), and treated with bromine (4 mL, 76 mmoles) in acetic acid solution (20 mL) over a 20 minute period. The resulting heterogenous mixture was stirred for 5 hours, then quenched and treated as described above. The resulting solids were vacuum dried at 50° C. to afford the title compound (19.1 grams, 72%) as a tan powder.

Provenance & Evidence