Reaktion #624606

Reaktionsgleichung

isopropylmagnesium chloride lithium chloride

ethyl 4-iodobenzoate

Butyraldehyde

→

ethyl 4-(1-hydroxybutyl)benzoate

Lösungsmittel

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturto warm to room temperature over 3 hours
2. 2
   SonstigeThe reaction was quenched with 1N HCl
3. 3
   Extraktionextracted three times with ethyl acetate
4. 4
   TrocknenThe combined organic layers were dried over sodium sulfate
5. 5
   Filtrationfiltered
6. 6
   Einengenconcentrated

Vorschrift

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).

Quelle