反应详情

温度

-78 °C

70% Nitric acid (3.16 mL) was added dropwise to a suspension of trifluoromethanesulfonic acid (9.34 mL, 105.6 mmol) in dichloromethane (250 mL). The suspension was cooled in a dry ice-acetone bath and a solution of 4-benzyl-benzoic acid (10.19 g, 48 mmol) in dichloromethane (50 mL) was added dropwise. The mixture was stirred for about 2 hours at −78° C. and an additional 2 hours at room temperature. The reaction mixture was poured into crushed ice. The separated organic layer was washed with dichloromethane (2x) and the combined organic layers were dried over (Na2SO4), and solvents were evaporated. Flecrystallization of the crude product from methanol/ethyl acetate gave 4-(4-nitrobenzyl)-benzoic acid (9.27 g, 58%) as a yellow solid.

1. temperatureThe suspension was cooled in a dry ice-acetone bath
2. additionThe reaction mixture was poured
3. custominto crushed ice
4. washThe separated organic layer was washed with dichloromethane (2x)
5. dry with materialthe combined organic layers were dried over (Na2SO4), and solvents
6. customwere evaporated