Acetic Anhydride → N-[1-(4-bromophenyl)ethyl]acetamide

Participants

Reaction Steps

Triethylamine (2.8 mL) was dropped to the solution of 1-(4-bromophenyl)ethanamine (2.0 g, 10.0 mmol), and acetic anhydride (1.53 g, 15.0 mmol) in dichloromethane (30 mL) at room temperature. Then the mixture was stirred at room temperature for 12 hours. The mixture was washed with sodium hydroxide solution (40 mL, 0.5M) and water (40 mL). The organic phase was dried over sodium sulfate and filtered. The filtrate was concentrated to give a residue. The residue was purified by column chromatography (silica gel, petroleum ether/ethyl acetate=1:5) to give N-(1-(4-bromophenyl)ethyl)acetamide (2.2 g, 91%) as a white solid. 1H NMR (300 MHz, d6-DMSO): δ 8.27 (d, J=4.8 Hz, 1H), 7.38 (d, J=8.4 Hz, 2H), 7.01 (d, J=8.4 Hz, 1H), 4.94 (m, 1H), 2.12 (s, 3H), 1.45 (d, J=6.6 Hz, 3H).

Provenance & Evidence