Methanamine, N-methoxy-, hydrochloride (1:1) → N-Methoxy-N-methyl-3-(1,1,2,2-tetrafluoroethoxy)benzamide

Participants

Reaction Conditions

Reaction Steps

3-(1,1,2,2-tetrafluoroethoxy)benzoic acid (10 g, 42.0 mmol) was dissolved in DMF (200 mL) and Hunig's Base (20.54 mL, 118 mmol). Benzotriazol-1-yl-oxy-tris-(dimethylamino)phosphonium hexafluorophosphate (BOP, 27.9 g, 63.0 mmol) and N-methoxy-N-methylamine hydrochloride (4.51 g, 46.2 mmol) were added to the reaction flask, and the resulting reaction mixture was stirred at 25° C. overnight. Crude reaction mixture was concentrated and purified on a silica gel column (340 g cartridge 0-10% EtOAc/Hexanes gradient) to afford N-methoxy-N-methyl-3-(1,1,2,2-tetrafluoroethoxy)benzamide. 1H NMR (400 MHz, CDCl3) δ 3.38 (s, 3H), 3.57 (s, 3H), 5.95 (t, J=52.9, 2.9 Hz, 1H), 7.33 (d, J=8.1 Hz, 1H), 7.45 (t, J=7.9 Hz, 1H), 7.58 (s, 1H), 7.63 (d, J=7.7 Hz, 1H).

Provenance & Evidence