反应详情

Step 2) To a solution of compound 145 (2.1 g, 9.77 mmol) in tetrahydrofuran (40.0 mL) was slowly added 4-ethylphenylmagnesium bromide (39 mL, 0.5 M solution in THF) at 0° C., and the reaction mixture was stirred for 12 h at room temperature. The resulting mixture was quenched with sat. NH4Cl, diluted with EtOAc and washed with brine. The organic layer was dried over MgSO4, filtered, and concentrated in vacuo. The crude was purified by silica gel column chromatography to provide (5-bromo-2-(hydroxymethyl)phenyl)(4-ethylphenyl)methanol (146, 1.53 g, 49%) as yellow oil. 1H NMR (400 MHz, CDCl3) δ 7.50 (d, J=2.0 Hz, 1H), 7.42 (dd, J=8.0, 2.0 Hz, 1H), 7.26-7.17 (m, 5H), 5.97 (s, 1H), 4.58 (d, J=12.8 Hz, 1H), 4.43 (d, J=12.4 Hz, 1H), 2.65 (q, J=7.6 Hz, 2H), 1.23 (t, J=7.6 Hz, 3H).

1. customat 0° C.
2. customThe resulting mixture was quenched with sat. NH4Cl
3. additiondiluted with EtOAc
4. washwashed with brine
5. dry with materialThe organic layer was dried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe crude was purified by silica gel column chromatography