Dichloromethane → 1-[7-Bromo-5-fluoro-3-(3-fluoro-benzyl)-benzofuran-2-yl]-ethanone

Beteiligte Stoffe

Reaktionsschritte

7-Bromo-5-fluoro-3-(3-fluoro-benzyl)-benzofuran (1.29 gm, 4 mmol), acetyl chloride (0.57 ml, 8 mmol) and dichloromethane (16 ml) were added to an oven dried flask and chilled in ice bath. Aluminum chloride (1.067 gm, 8 mmol) was added and after 5 minutes the reddish brown mixture was allowed to warm to room temperature and stir overnight. The mixture was diluted with hydrochloric acid (0.1M) and extracted three times with dichloromethane. The extracts were dried over magnesium sulfate and purified by column chromatography (ethyl acetate/hexane gradient) to give 1-[7-Bromo-5-fluoro-3-(3-fluoro-benzyl)-benzofuran-2-yl]-ethanone (1.2 gm, 82% yield).

Herkunft & Nachweise