Sodium Sulfite → HCID 118022035, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of the title compound from Step 4 (2.10 g, 6.38 mmol) in DCM (210 mL) was added MCPBA (4.41 g, 25.53 mmol) in several portions. The mixture was stirred at 25° C. for 12 hrs. The reaction was poured into sat. aq. Na2SO3 (100 mL) and extracted with DCM (80 mL×3). The combined organic layers were washed with sat. NaHCO3 (100 mL×2) and brine (100 mL), dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by silica gel chromatography (PE:EA=1:02:1) to give the title compound (2.10 g, 91%) as a white solid. 1H NMR (CDCl3, 400 MHz) δ 7.64 (d, J=2.0 Hz, 1H), 7.37 (dd, J1=8.4 Hz, J2=2.4 Hz, 1H), 6.95 (d, J=8.4 Hz, 1H), 4.43 (q, J=8.0 Hz, 2H), 4.15 (s, 2H), 2.91 (q, J=7.6 Hz, 2H), 1.39 (t, J=7.6 Hz, 3H).

Provenance & Evidence