反应详情

To a flask containing 4,5-difluoro-2-methoxy-4′-(3-nitro-benzyloxy)-biphenyl (1.49 g, 4.0 mmol) was added ethanol (40 ml), zinc (2.5 g, 40 mmol) and ammonium chloride (3.2 g, 60.2 mmol). Additional solvent was added over time, ethanol (30 mL at 15 min) and ethyl acetate (10 mL at 45 min). After 1 hr the reaction was filtered through Celite, concentrated, diluted with ethyl acetate (100 mL), washed with saturated aqueous sodium bicarbonate (200 mL) and brine (100 mL), dried over magnesium sulfate, concentrated and dried from hexanes/methylene chloride mixtures to yield 3-(4′,5′-difluoro-2′-methoxy-biphenyl-4-yloxymethyl)-phenylamine as a yellow oil (1.4 g, 100%). LC-MS (ES) calculated for C20H17F2NO2, 341.12; found m/z 342 [M+H]+.

1. filtrationAfter 1 hr the reaction was filtered through Celite
2. concentrationconcentrated
3. additiondiluted with ethyl acetate (100 mL)
4. washwashed with saturated aqueous sodium bicarbonate (200 mL) and brine (100 mL)
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated
7. dry with materialdried from hexanes/methylene chloride