反应详情

To a solution of 1-(2-bromophenyl)ethanol (1 g, 4.97 mmol) in DCM (12 mL) was added triethylamine trihydrofluoride (1.621 mL, 9.95 mmol) and XtalFluor-E® (1.708 g, 7.46 mmol) dropwise over 5 min. After addition the resulting mixture was stirred at room temperature for 1 h and then cooled to 0° C. and quenched by addition of sat. aq. NaHCO3. The layers were separated and the aqueous was extracted with DCM (2×). The combined organic layers were dried over anhydrous MgSO4, filtered and concentrated in vacuo to afford 1-bromo-2-(1-fluoroethyl)benzene. 1H NMR (400 MHz, CD2Cl2) δ ppm 7.54 (dt, J=8.0, 1.2 Hz, 1H), 7.50 (dd, J=7.8, 1.8 Hz, 1H), 7.38 (td, J=7.6, 1.3 Hz, 1H), 7.19 (td, J=7.7, 1.7 Hz, 1H), 5.90 (dq, J=46.6, 6.4 Hz, 1H), 1.60 (dd, J=3-24.2, 6.5 Hz, 3H).

1. additionAfter addition the resulting mixture
2. temperaturecooled to 0° C.
3. customquenched by addition of sat. aq. NaHCO3
4. customThe layers were separated
5. extractionthe aqueous was extracted with DCM (2×)
6. dry with materialThe combined organic layers were dried over anhydrous MgSO4
7. filtrationfiltered
8. concentrationconcentrated in vacuo