反应详情

温度

50 °C

5-Methoxy-2-nitro 9H-thioxanthene (11.59 g, 42.40 mmol) was suspended in ethyl acetate (250 ml). SnCl2.2H2O (47.84 g, 212 mmol) was added and the clear yellow solution was stirred at 50° C. overnight. The reaction was the quenched with NaOH (2M) and then extracted with ethyl acetate (3×300 ml). The organics were washed with saturated brine (100 ml), dried over magnesium sulphate and the solvents were removed in vacuo to give the title compound (10.32 g, 100%) as viscous yellow oil. The oil was used without further purification. 1HNMR (300 MHz, DMSO-d6): δH=3.83 (3H, s), 3.67 (2H, s), 5.14 (2H, bs), 6.43 (1H, dd), 6.61 (1H, d), 6.89 (1H, d), 6.99 (1H, d), 7.06 (1H, d), 7.18 (1H, t). m/z (LC-MS, ESP), RT=3.88 min, (M++1)=244.

1. customquenched with NaOH (2M)
2. extractionextracted with ethyl acetate (3×300 ml)
3. washThe organics were washed with saturated brine (100 ml)
4. dry with materialdried over magnesium sulphate
5. customthe solvents were removed in vacuo