Ammonia → 4,4,4-Trifluoro-3,3-dimethylbutanamide

Participants

Reaction Conditions

Reaction Steps

Treat a 0° C. solution of 4,4,4-trifluoro-3,3-dimethylbutanoic acid [See: US2010/0240663] (17 g, 100 mmol) in acetonitrile (200 mL) with 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (23 g, 120 mmol) and 1-hydroxybenzotriazole (16.2 g, 120 mmol), stir at 0° C. for 2 h, treat with concentrated ammonia in water (25 wt %, 15 mL), allow to warm to RT and stir overnight. Remove the organics under reduced pressure, dissolve the residue in EtOAc, and wash with saturated. NaHCO3, then brine, dry over MgSO4, and concentrate to dryness. Treat the material with pet ether, collect the solid via filtration and dry to afford the title compound (13 g, 77% yield). 1H NMR (400 MHz, DMSO-d6): δ 7.46 (s, 1H), 6.93 (s, 1H), 2.19 (s, 2H), 1.18 (s, 6H).

Provenance & Evidence