反应详情

温度

95 °C

A solution of N-(2-fluorophenyl)-3,4-dimethoxythiobenzamide (0.850 g, 2.92 mmol) and sodium hydroxide (0.93 g, 23.3 mmol) in water (10 mL) and ethanol (0.5 mL) was added dropwise to a solution of potassium ferricyanide (3.84 g, 11.7 mmol) in water (5 mL) at 95° C. The resulting solution was stirred at 95° C. for a further 2 h and then cooled in an ice bath. The precipitate was collected by vacuum filtration, washed with water and dissolved in ethyl acetate (10 mL) and insoluble material was removed by filtration. The filtrate was concentrated in vacuo and the crude product purified by column chromatography (dichloromethane) to give the required product as a pale yellow powder (0.46 g, 55% yield), mp 129° C.; 1H NMR (DMSO-d6) δ 7.95 (1H, m, ArH), 7.65 (2H, m, ArH), 7.42 (2H, m, ArH), 7.15 (1H, m, ArH), 3.90 (3H, s, OMe), 3.88 (3H, s, OMe); m/z (CI) 290 (M++1); Anal. (C15H12FNO2S) C, H, N. C: found 62.36%, calc. 62.27%; H: found 4.19%, calc.4.18%; N: found 4.93%, calc. 4.84%.

1. temperaturecooled in an ice bath
2. filtrationThe precipitate was collected by vacuum filtration
3. washwashed with water
4. dissolutiondissolved in ethyl acetate (10 mL)
5. custominsoluble material was removed by filtration
6. concentrationThe filtrate was concentrated in vacuo
7. customthe crude product purified by column chromatography (dichloromethane)