Boron tribromide → (4-(2-Bromoethoxy)-3-fluorophenyl)(4-hydroxyphenyl)methanone

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Reaction Steps

BBr3 (0.5 mL, 5.29 mmol) was added to (4-(2-bromoethoxy)-3-fluorophenyl)(4-methoxyphenyl)methanone (930 mg, 2.63 mmol) in dichloromethane (6 mL) at 0° C. Stirring was continued at room temperature for 2 h under a nitrogen atmosphere. The reaction mixture was quenched with ice water and extracted with dichloromethane. The extract was washed with water and brine, dried over sodium sulfate, filtered, concentrated, and purified by column chromatography over silica gel (eluent: petroleum ether/ethyl acetate=5/1 to 2/1) to give 536 mg (60%) of the subtitle compound as a beige solid. 1H NMR (400 MHz, CDCl3) δ 7.74 (d, J=8.4 Hz, 2H), 7.59 (d, J=12.4 Hz, 1H), 7.56 (d, J=8.0 Hz, 1H), 7.03 (dd, J=8.0 Hz, 8.0 Hz, 1H), 6.92 (d, J=8.4 Hz, 2H), 5.88 (s, 1H), 4.44 (t, J=6.4 Hz, 2H), 3.70 (t, J=6.4 Hz, 2H).

Provenance & Evidence