Sodium hydride → HCID 68774932, compound

Participants

Reaction Steps

To a solution of N-(3-bromophenyl)-2,6-difluorobenzamide in 200 mL of DMF at room temperature and under nitrogen atmosphere, NaH 60% in oil dispersion (104.7 mmol) is slowly added and the reaction mixture is stirred for 30 minutes. Tert-butylbromoacetate (104.7 mmol) is added and the reaction stirred at room temperature. After 12 hours the reaction is complete by TLC (hexanes:ethyl acetate=8:2) and analytical LCMS (20 to 100% CH3CN). Ethyl acetate and water are added to the reaction mixture and the phases are separated. The organic phase is dried on sodium sulfate, filtered and the solvent is evaporated. The crude is purified by automated column chromatography (gradient of hexanes and ethyl acetate) to give tert-butyl 2-(N-(3-bromophenyl)-2,6-difluorobenzamido)acetate: 1H NMR (400 MHz, CDCl3) δ 7.36 (bs, 1H), 7.20 (m, 1H), 7.07 (m, 2H), 6.96 (t, J=8 Hz, 1H), 6.62 (td, J=8 Hz, J2=1.2 Hz), 4.32 (s, 2H), 1.39 (s, 9H); MS: (ES+) 448.0 (M+23)+.

Provenance & Evidence