反应详情

A mixture of 2-(4-bromophenyl)ethanol (0.70 mL, 5 mmol), morpholine (0.52 mL, 6 mmol), LHMDS (11 mL, IM solution in THF), Pd2 (dba)3 (46 mg, 0.05 mmol), and CyMAP (24 mg, 0.06 mmol) was heated to reflux for 16 hours. Cooled to room temperature. Acidified with IM HCl, stirred for 10 minutes, and neutralized with saturated NaHCO3. Partitioned between ethyl acetate and water. The organic layer was washed with brine, dried (MgSO4), filtered, and concentrated under vacuum. The residue was purified by flash column chromatography on silica gel with 1:1 hexanes/ethyl acetate to provide 520 mg (50%) of the desired product. MS (ESI) m/e 208 (M+H)+, 1H NMR (300 MHz, CDCl3): □ 7.15 (d, J=8.48 Hz, 2H), 6.88 (d, J=8.48 Hz, 2H), 3.78-3.87 (m, 6H), 3.11-3.14 (m, 4H), 2.79 (t, J=6.61 Hz, 2H), 1.43 (m, 1H).

1. temperaturewas heated
2. temperatureto reflux for 16 hours
3. customPartitioned between ethyl acetate and water
4. washThe organic layer was washed with brine
5. dry with materialdried (MgSO4)
6. filtrationfiltered
7. concentrationconcentrated under vacuum
8. customThe residue was purified by flash column chromatography on silica gel with 1:1 hexanes/ethyl acetate