反应详情

温度

-40 °C

At −40° C., isopropylmagnesium chloride lithium chloride (15.3 mL, 1.3 M in THF, 19.9 mmol) was added dropwise to a solution of ethyl 4-iodobenzoate (5000 mg, 18.11 mmol) in tetrahydrofuran (30 mL). The solution was stirred at −40° C. for 40 minutes. Butyraldehyde (1830 mg, 25.4 mmol) was added. The mixture was allowed to warm to room temperature over 3 hours. The reaction was quenched with 1N HCl and extracted three times with ethyl acetate. The combined organic layers were dried over sodium sulfate, filtered and concentrated to give ethyl 4-(1-hydroxybutyl)benzoate. 1H NMR (400 MHz, CDCl3, δ): 8.02 (d, J=8.6 Hz, 2H), 7.41 (d, J=8.0 Hz, 2H), 4.83-4.66 (m, 1H), 4.38 (q, J=7.2 Hz, 2H), 1.86 (d, J=3.7 Hz, 1H), 1.83-1.61 (m, 2H), 1.51-1.42 (m, 1H), 1.39 (t J=7.2 Hz, 3H), 1.36-1.23 (m, 1H), 0.94 (t, J=7.6 Hz, 3H).

1. temperatureto warm to room temperature over 3 hours
2. customThe reaction was quenched with 1N HCl
3. extractionextracted three times with ethyl acetate
4. dry with materialThe combined organic layers were dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated