反应详情

To a solution of 1-(4-amino-3′-chloro-biphenyl-3-yl)-ethanone (see example 35, 0.15 g, 0.61 mmol) in anhydrous methanol was added sodium borohydride (0.07 g, 1.03 mmol) at room temperature (rt) under nitrogen. After 15 minutes, the reaction mixture was treated with ice-water. Ethyl acetate (30 mL) was then added, the organic layer was separated, and aqueous layer was extracted with ethyl acetate (3×20 mL). The combined organic layers were washed with brine (10 mL) and dried over MgSO4. After removal of solvent, the residue obtained was crystallized from toluene to afford 1-(4-amino-3′-chloro-biphenyl-3-yl)-ethanol as a white solid (0.087 g, 58%): 1H-NMR (DMSO-d6) δ7.55 (t, 1H, J=1.4 Hz), 7.50 (d, 1H, J=7.8 Hz), 7.44 (d, 1H, J=2.1 Hz), 7.39 (t, 1H, J=8.2 Hz), 7.31-7.21 (m, 2H), 6.68 (d, 1H, J=8.1 Hz), 5.25 (s, 2H), 5.20 (m, 1H), 4.83 (m, 1H), 1.35 (d, 3H, J=8.8 Hz); MS (EI) m/z 247 (M+).

1. customthe organic layer was separated
2. extractionaqueous layer was extracted with ethyl acetate (3×20 mL)
3. washThe combined organic layers were washed with brine (10 mL)
4. dry with materialdried over MgSO4
5. customAfter removal of solvent
6. customthe residue obtained
7. customwas crystallized from toluene