1-(2-Phenylpyrimidin-5-yl)ethanone → 2-Bromo-1-(2-phenylpyrimidin-5-yl)ethanone

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a solution consisting of 1-(2-phenylpyrimidin-5-yl)ethanone (Step A, 700 mg, 3.5 mmol) in dichloromethane (25 mL) was added tetrabutylammonium tribromide (1.87 g, 3.90 mmol). The reaction mixture was sealed with a screw top and warmed at 40° C. for 5 hours and allowed to cool to room temperature over a weekend. The pale yellow precipitate formed was collected on a filter and washed with 1:1 dichloromethane-hexane to afford the title intermediate (770 mg, 79%); Rf 0.31 with 9:1 v/v hexanes-ethyl acetate; MS (ESI+) m/z 279, 277 (M+1, Br isotopes).

Herkunft & Nachweise