反应详情

To a solution 2-chloro-4-(trifluoromethyl)pyrimidine (5.00 g, 27.4 mmol) in dimethyl sulfoxide (25 mL) was added sodium cyanide (1.68 g, 34.2 mmol). The reaction was stirred at room temperature for 30 minutes and poured into cold saturated aqueous NaHCO3 solution. The mixture was transferred to a 100 mL reparatory funnel and extracted with ethyl ether (3×50 mL). The combined organic layers were washed with brine (50 mL), dried over sodium sulfate, filtered, and concentrated under reduced pressure to afford the title compound, 4-trifluoromethyl-pyrimidine-2-carbonitrile, as a brown oil, which was used in the next step without further purification. 1H NMR (400 MHz, CDCl3) δ 9.16 (d, J=5.1 Hz, 1H), 7.88 (d, J=5.1 Hz, 1H).

1. customThe mixture was transferred to a 100 mL reparatory funnel
2. extractionextracted with ethyl ether (3×50 mL)
3. washThe combined organic layers were washed with brine (50 mL)
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure