2-(Dimethylamino)ethanol → 2-(3-bromo-5-nitrophenoxy)-N,N-dimethylethanamine

関与物質

反応手順

1-Bromo-3,5-dinitrobenzene (1 g, 4.1 mmol), 2-(dimethylamino)ethanol (0.54 g, 6.1 mmol), potassium hydroxide (0.45 g, 8.1 mmol), and water (0.5 mL) in DMF (5 mL) were heated at 80° C. After 20 hours, the reaction mixture was diluted with cold water and extracted with dichloromethane (2×100 mL). The organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated. The crude product was purified by silica gel chromatography (stepwise gradient, 2% ethyl acetate in hexanes to ethyl acetate) to give 2-(3-bromo-5-nitrophenoxy)-N,N-dimethylethanamine (669 mg, 57.2% yield) as a brown oil. HPLC: Rt=1.04 min. (PHENOMENEX® Luna 5 micron C18 4.6×30 mm, 10-90% aqueous methanol containing 0.1% TFA, 2 min. gradient, flow rate=5 mL/min., detection at 254 nm). MS (ES): m/z=290.93 [M+H]+.

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