反应详情

温度

5 °C

Concentrated hydrochloric acid (16 mL) was added dropwise at a moderate rate to a heterogeneous mixture of 2-methyl-4-(trifluoromethyl)benzenamine (14 g, 80 mmol) and 120 mL of water while stirring vigorously. A thick suspension resulted which was stirred for 20 minutes, diluted with 280 mL of water and cooled to 5° C. A solution of sodium nitrite (5.5 g, 80 mmol) and 25 mL of water was added slowly to the reaction suspension. After stirring for 30 minutes at 5° C. a solution resulted which was stirred cold for 30 more minutes and then neutralized with potassium carbonate. This diazonium salt solution was then added portionwise via cannula to a stirred, 95° C. mixture of potassium cyanide (22 g, 0.34 mole), copper sulfate pentahydrate (20 g, 80 mmol) and 140 mL of water. After the addition the mixture was stirred for 30 minutes at 95° C. and then allowed to cool to room temperature. Ether was added and the heterogeneous mixture was filtered through celite. The solids were washed with ether, and the filtrate was partitioned. The aqueous phase was extracted with ether, and the combined organic extracts were dried over magnesium sulfate and concentrated under reduced pressure to afford 13.1 g of the title compound as brown oil.

1. customA thick suspension resulted which
2. stirringwas stirred for 20 minutes
3. stirringAfter stirring for 30 minutes at 5° C. a solution
4. customresulted which
5. stirringwas stirred cold for 30 more minutes
6. additionAfter the addition the mixture
7. stirringwas stirred for 30 minutes at 95° C.
8. temperatureto cool to room temperature
9. filtrationthe heterogeneous mixture was filtered through celite
10. washThe solids were washed with ether
11. customthe filtrate was partitioned
12. extractionThe aqueous phase was extracted with ether
13. dry with materialthe combined organic extracts were dried over magnesium sulfate
14. concentrationconcentrated under reduced pressure