反应详情

温度

0 °C

Prepare a solution of (5-phenylthiophene-3-yl)methanol (394 mg, 2.07 mmol) in tetrahydrofuran (30 mL). Cool to 0° C. under nitrogen. Add PPh3 (723 mg, 2.75 mmol). Add dropwise a solution of carbon tetrabromide (912 mg, 2.75 mmol) in CH3CN (15 mL). Stir the reaction at 0° C. for 2 hours, then warm to room temperature overnight. Concentrate the mixture and flash-chromatograph on silica gel eluting with 7:3 ethyl acetate/hexane to afford 515 mg of 4-bromomethyl-2-phenylthiophene as a white solid. MS: m/e=254 [MH+].

1. customthe reaction at 0° C. for 2 hours
2. temperaturewarm to room temperature overnight
3. concentrationConcentrate the mixture and flash-chromatograph on silica gel eluting with 7:3 ethyl acetate/hexane