反应详情

温度

60 °C

Fuming nitric acid (5 mL) was cooled on an ice bath. Methyl 2-(trifluoromethoxy)benzoate (5 g, 22.7 mmol) was slowly added within 30 minutes keeping the temperature below 15° C. The reaction was then stirred at 60° C. for 1 hour and 2 hours at room temperature. The mixture was poured on ice water whereupon an oil separated. The aqueous supernatant was decanted and additional water (50 mL) was added to the oil. After neutralisation with sodium hydrogen carbonate, the mixture was extracted with ethyl acetate (25 mL). The aqueous phase was extracted with ethyl acetate (15 mL) once more. The combined organic phases were washed with saturated sodium chloride (2×15 mL), dried (MgSO4), and concentrated in vacuo to give 5.69 g of 5-nitro-2-trifluoromethoxybenzoic acid methyl ester.

1. customthe temperature below 15° C
2. additionThe mixture was poured on ice water whereupon an oil
3. customseparated
4. customThe aqueous supernatant was decanted
5. additionadditional water (50 mL) was added to the oil
6. extractionAfter neutralisation with sodium hydrogen carbonate, the mixture was extracted with ethyl acetate (25 mL)
7. extractionThe aqueous phase was extracted with ethyl acetate (15 mL) once more
8. washThe combined organic phases were washed with saturated sodium chloride (2×15 mL)
9. dry with materialdried (MgSO4)
10. concentrationconcentrated in vacuo