反应详情

To a stirred suspension of iodoxybenzoic acid (3.7 g, 13.2 mmol, 1.1 eq) in 100:1 CHCl3/H2O (25 mL) was added tetraethylammonium bromide (TEAB) (126 mg, 5 mol %), followed by the addition of p-tolyl sulfide (1.66 g, 12 mmol) in one portion. The mixture was stirred at room temperature for approximately 30 minutes until consumption of sulfide was observed (TLC, hexanes/EtOAc 1/1). The residual solids were removed by filtration and washed with CHCl3 (40 mL). The combined filtrate was washed successively with saturated aq. NaHCO3 (30 mL), saturated aq. NaCl (30 mL), dried over sodium sulfate, and concentrated to provide the crude product. Purification by silica gel column chromatography (50% hexanes/EtOAc elution) afforded the title compound (1.68 g, yield 91%). 1H NMR (300 MHz, CDCl3) δ 7.52 (d, J=8.4 Hz, 2H), 7.32 (d, J=8.4 Hz, 2H), 2.71 (s, 3H), 2.42 (s, 3H); ESI-MS m/z 154.7 (M+H)+.

1. customThe residual solids were removed by filtration
2. washwashed with CHCl3 (40 mL)
3. washThe combined filtrate was washed successively with saturated aq. NaHCO3 (30 mL), saturated aq. NaCl (30 mL)
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated
6. customto provide the crude product
7. customPurification
8. washby silica gel column chromatography (50% hexanes/EtOAc elution)