反应详情

温度

90 °C

To a solution of 2-fluoro-5-(4-methoxy-benzoyl)-benzenesulfonamide (0.15 g, 0.48 mmol) dissolved in dioxane (3 mL) is added sodium thiomethoxide (0.041 g, 0.57 mmol). The reaction mixture is heated at 90° C. for 4 h and then cooled to room temperature and concentrated in vacuo. The residue is partitioned between water and methylene chloride, and the aqueous phase is extracted with methylene chloride three times. The combined organic extracts are washed with a saturated sodium chloride solution, dried with magnesium sulfate, and concentrated in vacuo. Purification by silica gel chromatography (50% ethyl acetate-hexane) gives 0.11 g (68%) of the title compound as a white solid. 1H NMR (CDCl3): δ 8.4 (d, J=2 Hz, 1H), 7.90 (dd, J=8, 2 Hz, 1H), 7.80 (d, J=9 Hz, 2H), 7.50 (d, J=8 Hz, 1H), 7.00 (d, J=9 Hz, 2H), 5.20 (s, 2H), 3.90 (s, 3H), 2.65 (s, 3H). Analytics calculated for C15H15NO4S2: C, 53.04; H, 4.48; N, 4.15. Found: C, 52.67; H, 4.57; N, 4.08. MS (m/z): 336 (M−1).

1. temperaturecooled to room temperature
2. concentrationconcentrated in vacuo
3. customThe residue is partitioned between water and methylene chloride
4. extractionthe aqueous phase is extracted with methylene chloride three times
5. washThe combined organic extracts are washed with a saturated sodium chloride solution
6. dry with materialdried with magnesium sulfate
7. concentrationconcentrated in vacuo
8. customPurification by silica gel chromatography (50% ethyl acetate-hexane)