反应详情

温度

55 °C

2-chloro-5-nitrobenzaldehyde (2.99 g, 16.1 mmol), potassium carbonate (2.45 g, 17.7 mmol) and propane-2-thiol (1.35 g, 17.7 mmol) were dissolved in 10.0 ml, DMF in a 50 mL, round-bottomed flask under dry nitrogen, topped with a reflux condenser. The reaction mixture was heated to 55° C. for 24 h. After cooling the mixture was added to 150 mL of saturated potassium carbonate solution. The yellow-brown solid was filtered, washed with water and further purified by chromatography on silica gel using 10:1 petroleum ether 60-80 and ether as eluent. Yield: 1.81 g, 50%, yellow solid. 1H NMR (200 MHz, CDCl3): δ 1.46 (d, J=6.9 Hz, 6H), 3.67 (septet, J=6.9 Hz, 1H), 7.55 (d, J=8.7 Hz, 1H), 8.32 (dd, J=2.5, 8.7 Hz, 1H), 8.66 (d, J=2.5 Hz, 1H), 10.3 (s, 1H) ppm. 13C NMR (50 MHz, CDCl3): δ 22.5, 36.6, 127.2, 127.4, 127.9, 133.4, 144.7, 150.8, 189.1.

1. customtopped with a reflux condenser
2. temperatureAfter cooling the mixture
3. filtrationThe yellow-brown solid was filtered
4. washwashed with water
5. customfurther purified by chromatography on silica gel using 10:1 petroleum ether 60-80 and ether as eluent