反应详情

温度

85 °C

5-Fluoro-2-nitrobenzotrifluoride (1.46 g, 7.0 mmol) and trans-4-aminocyclohexane carboxylic acid (1.0 g, 7.0 mmol) were dissolved in a mixture of acetonitrile (42 mL), dimethylformamide (21 mL), and water (7 mL). The resulting solution was heated to 85° C. and then maintained at this temperature overnight. After cooling to room temperature, the mixture was partly concentrated under vacuum, diluted with ethyl acetate (50 mL), and washed with water (30 mL). The aqueous phase was acidified to pH 4 by the addition of 1 M HCl. This formed a precipitate, which was isolated by filtration. The filtrate was extracted with ethyl acetate (2×10 mL). The combined organic phases were dried over magnesium sulfate, filtered, and concentrated under vacuum to afford a solid. Both solids were combined and dried under vacuum. The desired product was isolated as a yellow solid (2.4 g, quantitative yield).

1. temperaturemaintained at this temperature overnight
2. temperatureAfter cooling to room temperature
3. concentrationthe mixture was partly concentrated under vacuum
4. additiondiluted with ethyl acetate (50 mL)
5. washwashed with water (30 mL)
6. additionThe aqueous phase was acidified to pH 4 by the addition of 1 M HCl
7. customThis formed a precipitate
8. customwhich was isolated by filtration
9. extractionThe filtrate was extracted with ethyl acetate (2×10 mL)
10. dry with materialThe combined organic phases were dried over magnesium sulfate
11. filtrationfiltered
12. concentrationconcentrated under vacuum
13. customto afford a solid
14. customdried under vacuum