反应详情

温度

50 °C

Into a 250 mL flask was weighed 11.3 g of 5-(bromomethyl)-1-(2-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazole (33 mmol) which was then dissolved in 40 mL of dry DMF. The resulting solution was treated with 2.5 g of sodium cyanide (52 mmol). The resulting suspension was heated to 50° C. After 4 hours at 50° C., heating was discontinued and the reaction was allowed to cool to room temperature. After standing at room temperature for 2 days the reaction was diluted with ether and H2O. The layers were separated and the aqueous layer was extracted with ether (4×). The combined organic layers were washed with H2O (3×), then brine (2×), dried (Na2SO4), filtered and concentrated in vacuo to afford crude 2-(1-(2-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-5-yl)acetonitrile as a red oil, yield 8.2 g (86%), 1H NMR (400 MHz, CDCl3): δ 7.62-7.46 (m, 4H), 6.82 (s, 1H), 3.9-3.4 (broad hump, 2H).

1. customInto a 250 mL flask was weighed
2. temperatureheating
3. temperatureto cool to room temperature
4. waitAfter standing at room temperature for 2 days
5. customThe layers were separated
6. extractionthe aqueous layer was extracted with ether (4×)
7. washThe combined organic layers were washed with H2O (3×)
8. dry with materialbrine (2×), dried (Na2SO4)
9. filtrationfiltered
10. concentrationconcentrated in vacuo