反应详情

2-(4-Chloro-benzenesulfonylmethyl)-1,3,4-trifluoro-benzene (4.0 g, 12.5 mmol) was dissolved in 40 mL dry DMF. (2-Bromo-ethoxy)-tert-butyl-dimethylsilane (4.1 g, 17.1 mmol) and NaH (2.28 g, 95.0 mmol) were added respectively. The solution was stirred at room temperature overnight. 200 mL of water and 200 mL of EtOAc were added. The aqueous layer was washed with 100 mL of EtOAc. The combined organic layers were washed with brine (100 mL), dried over Na2SO4 and concentrated. The product was purified using column chromatography (hex./EtOAc 100/0 to 90/10 in 45 min, 1.7 g, 28%). 1H NMR (CDCl3 400 MHz) δ 7.65 (m, 2H), 7.46 (m, 2H), 7.14 (m, 1H), 6.84 (m, 0.5), 6.73 (m, 0.5H), 4.87 (m, 1H), 4.79 (m, 1H), 4.37 (m, 1H), 2.55 (m, 2H), 2.04 (s, 9H), −0.13 (d, J=22.7 Hz, 6H).

1. washThe aqueous layer was washed with 100 mL of EtOAc
2. washThe combined organic layers were washed with brine (100 mL)
3. dry with materialdried over Na2SO4
4. concentrationconcentrated
5. customThe product was purified
6. customcolumn chromatography (hex./EtOAc 100/0 to 90/10 in 45 min, 1.7 g, 28%)