反应详情

The title compound was synthesized according to the method described in WO 2008/073956 A2. To a solution of N-(2-(hydroxymethyl)phenyl)methanesulfonamide (3.44 g, 17.1 mmol) in anhydrous methylene chloride (68 mL) was added manganese dioxide (85% Aldrich, 17 g) and the mixture was stirred at ambient temperature overnight. Additional manganese dioxide (1.6 g) was added and the mixture stirred at 30° C. for 8 hours. The mixture was filtered through Celite, washing with methylene chloride, and the organic solution concentrated. The crude residue was purified by silica gel column chromatography (40-60% ethyl acetate in hexanes) to give a white solid (2.1 g, 62%). 1H NMR (CDCl3, 300 MHz) δ 10.59 (br s, 1H), 9.91 (s, 1H), 7.75-7.59 (m, 3H) 7.28-7.23 (t, 1H, J=7.5 Hz), 3.12 (s, 3H).

1. stirringthe mixture stirred at 30° C. for 8 hours
2. filtrationThe mixture was filtered through Celite
3. washwashing with methylene chloride
4. concentrationthe organic solution concentrated
5. customThe crude residue was purified by silica gel column chromatography (40-60% ethyl acetate in hexanes)