4-tert-Butylphenol → Ethyl 2-(4-tert-butylphenoxy)propanoate

HRID 1393412Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1393412
[C:1]([C:5]1[CH:10]=[CH:9][C:8]([OH:11])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].Br[CH:15]([CH3:21])[C:16]([O:18][CH2:19][CH3:20])=[O:17]>CN(C=O)C.C(OCC)(=O)C>[CH2:19]([O:18][C:16](=[O:17])[CH:15]([O:11][C:8]1[CH:7]=[CH:6][C:5]([C:1]([CH3:4])([CH3:2])[CH3:3])=[CH:10][CH:9]=1)[CH3:21])[CH3:20]

Komponenten

6

Edukt 3

HCID 73934-tert-ButylphenolHCID 24758Sodium hydrideHCID 79040Ethyl 2-bromopropionate

Produkt 1

HCID 3023318Ethyl 2-(4-tert-butylphenoxy)propanoateAusbeute 100 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

4-t-Butylphenol (7.52 g, 50 mmol) in anhydrous DMF (40 mL) was added dropwise to NaH (2.2 g, 55 mmol, 60% w/w in mineral oil) at 0° C. under an atmosphere of nitrogen. After five min, ethyl 2-bromopropionate (6.49 mL, 50 mmol, d=1.394) was added rapidly dropwise and the resultant mixture was allowed to stir for 18 h, gradually warming to ambient temperature. The reaction mixture was diluted with ethyl acetate (300 mL) and extracted twice with water and once with brine. The organic layer was dried over Na2SO4 and concentrated in vacuo to produce a colorless oil (12.5 g, 100%) 1H NMR (300 MHz, CDCl3): δ 7.28 (d, 2H, J=5.5), 6.80 (d, 2H, J=5.5), 4.70 (q, 1H, J=6.6), 4.22 (q, 2H, J=7.1), 1.59 (d, 3H, J=6.6), 1.28 (s, 9H), 1.25 (t, 3H, J=7.1). MS [EI+] 251 (M+H)+, 268 (M+NH4)+.

Aufarbeitung

  1. extractionextracted twice with water and once with brine
  2. dry with materialThe organic layer was dried over Na2SO4
  3. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-2ee87feefcb74c2d803231ede5834bf6
Quelldatensatz
uspto-grants-2008_03
Patentnummer
US07345070B2

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