反应详情

A mixture of Example 78 (1.0 g, 2.17 mmol) and m-chloroperbenzoic acid (534 mg, 1 eq) in DCM (50 mL) was stirred at r.t. for 2 h. The mixture was diluted with DCM, washed with NaHCO3 aq, dried (MgSO4) and concentrated in vacuo. Purification by column chromatography (silica, 50% EtOAc in DCM) gave the title compound (850 mg, 82%). δH (CDCl3) 8.80 (1H, s), 8.12-7.70 (2H, m), 7.65-7.53 (3H, m), 7.50 (1H, t, J 7.4 Hz), 7.27 (1H, d, J 9.8 Hz), 7.17-7.09 (2H, m), 6.45 (1H, d, J 9.8 Hz), 4.28 (2H, q, J 7.1 Hz), 2.83 (3H, s), 1.30 (3H, t, J 7.1 Hz). LCMS (ES+) RT 3.16 minutes, 478 (M+H)+.

1. washwashed with NaHCO3 aq
2. dry with materialdried (MgSO4)
3. concentrationconcentrated in vacuo
4. customPurification by column chromatography (silica, 50% EtOAc in DCM)