反应详情

To a mixture of DMF (5 ml), 1-bromomethyl-3-nitro-benzene (0.92 g, 4.2 mmol), and 4′,5′-difluoro-2′-methoxy-biphenyl-4-ol (1 g, 4.2 mmol) was added lithium bis(trimethylsilyl)amide (1M in THF, 4.4 ml). The reaction was stirred at room temperature overnight and was then diluted with ethyl acetate (200 mL), washed with water (200 mL), aqueous ammonium chloride (10%, 200 mL) and brine, dried over magnesium sulfate and concentrated to yield 4,5-difluoro-2-methoxy-4′-(3-nitro-benzyloxy)-biphenyl as yellow solid (1.5 g, 95%). LC-MS (ES) calculated for C20H15F2NO4, 371.1; found m/z 370 [M−H]−.

1. washwashed with water (200 mL), aqueous ammonium chloride (10%, 200 mL) and brine
2. dry with materialdried over magnesium sulfate
3. concentrationconcentrated