1-(1-Benzofuran-3-yl)ethan-1-one → 1-(Benzofuran-3-yl)-2-bromoethanone

Beteiligte Stoffe

Reaktionsschritte

A solution of phenyltrimethylammonium tribromide (2.47 g) in tetrahydrofuran (20 ml) was added dropwise at ambient temperature under nitrogen over 5 minutes to a stirred solution of 3-acetylbenzo[b]furan (1 g) in tetrahydrofuran (20 ml), then the mixture was stirred at ambient temperature for a further 1.5 hours, filtered, and the solvent removed in vacuo. The residue was triturated with ether, and the resulting solid was collected by filtration and dried in vacuo at ambient temperature to give 3-(2-bromoacetyl)benzo[b]furan as an off-white solid (0.25 g).

Herkunft & Nachweise