Methyl 4-Formylbenzoate → Methyl 4-(1-hydroxybutyl)benzoate

HRID 1427519Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1427519
[CH:1]([C:3]1[CH:12]=[CH:11][C:6]([C:7]([O:9][CH3:10])=[O:8])=[CH:5][CH:4]=1)=[O:2].[CH2:13]([Mg]Br)[CH2:14][CH3:15]>O1CCCC1>[OH:2][CH:1]([C:3]1[CH:12]=[CH:11][C:6]([C:7]([O:9][CH3:10])=[O:8])=[CH:5][CH:4]=1)[CH2:13][CH2:14][CH3:15]

Komponenten

4

Edukt 2

HCID 15294Methyl 4-FormylbenzoateHCID 178455851HCID 178455851, Verbindung

Produkt 1

HCID 10443031Methyl 4-(1-hydroxybutyl)benzoateAusbeute 47 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

A solution of methyl 4-formylbenzoate (2.09 g, 12.7 mmol) in tetrahydrofuran (50 mL) was cooled to 0° C. To this solution was added n-propylmagnesium bromide (6.4 mL, 2.0M in THF) dropwise over 20 minutes. The reaction was stirred at 0° C. for 2 h. The reaction was then quenched by addition of saturated aqueous ammonium chloride. This mixture was extracted with ethyl acetate. The organic layer was dried over magnesium sulfate, filtered and concentrated. Purification by silica gel chromatography gave methyl 4-(1-hydroxybutyl)benzoate (1.25 g, 47%) as a colorless oil. 1H NMR (400 MHz, CDCl3, δ) 7.97-8.02 (m, 2H), 7.40 (d, J=8.4 Hz, 2H), 4.74 (dd, J=7.8, 5.7 Hz, 1H), 3.90 (s, 3H), 1.61-1.82 (m, 2H), 1.23-1.49 (m, 2H), 0.92 (t, J=7.32 Hz, 3H).

Aufarbeitung

  1. customThe reaction was then quenched by addition of saturated aqueous ammonium chloride
  2. extractionThis mixture was extracted with ethyl acetate
  3. dry with materialThe organic layer was dried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification by silica gel chromatography

Quellen und Nachweise

ORD-Eintrag
ord-d6bf17367afa4b738746b12d15245e71
Quelldatensatz
uspto-grants-2015_01
Patentnummer
US08933104B2

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