Aluminium lithium hydride → 2,2-Bis(hexyloxy)propan-1-ol

HRID 907509

Reaktionsgleichung

Reaktionsgleichung von HRID 907509
[H-].[H-].[H-].[H-].[Li+].[Al+3].[CH2:7]([O:13][C:14]([O:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH3:31])([CH3:24])[C:15](OCCCCCC)=[O:16])[CH2:8][CH2:9][CH2:10][CH2:11][CH3:12]>CCOCC>[CH2:26]([O:25][C:14]([O:13][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH3:12])([CH3:24])[CH2:15][OH:16])[CH2:27][CH2:28][CH2:29][CH2:30][CH3:31]

Komponenten

4

Edukt 2

HCID 21226445Aluminium lithium hydrideHCID 46945489Hexyl 2,2-bis(hexyloxy)propanoate

Produkt 1

HCID 469453022,2-Bis(hexyloxy)propan-1-olAusbeute 96,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 3283Diethyl EtherLösungsmittel2×

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

To a mixture of LiAlH4 (3.44 g, 90.5 mmol) in Et2O (200 mL) is added a solution of ester 3 (29.5 g, 82.3 mmol) in Et2O (100 mL). After addition, the mixture is refluxed for 6 hours. The reaction mixture is cooled to 0° C. and quenched with ethyl acetate (20 mL) and H2O (20 mL). The mixture is added to saturated potassium sodium tartrate (300 mL) and stirred at 23° C. for 12 hours. The mixture is extracted with Et2O (2×200 mL) and the combined organic layers are dried over anhydrous sodium sulfate. The solvent is removed and the residue is purified by silica gel chromatography (1→10% ethyl acetate/hexane) to give 2,2-bis(hexyloxy)propan-1-ol 4 (20.6 g, 94%) as a colorless oil: Rf (15% EtOAc/hexane)=0.20; IR (thin film, cm−1) 3430, 2955, 2929, 2859, 1467, 1378, 1244, 1155, 1112, 1064, 876; 1H NMR (600 MHz, C6D6) δ 3.58 (d, J=6.6 Hz, 2H), 3.43 (t, J=6.6 Hz, 4H), 1.58 (t, J=6.6 Hz, 1H), 1.53 (m, 4H), 1.36 (s, 3H), 1.34-1.22 (m, 12H), 0.88 (t, J=7.2 Hz, 6H); 13C NMR (150 MHz, C6D6) δ 101.0, 66.2, 61.3, 32.5, 30.9, 26.8, 23.4, 21.3, 14.6.

Aufarbeitung

  1. additionAfter addition
  2. temperaturethe mixture is refluxed for 6 hours
  3. customquenched with ethyl acetate (20 mL) and H2O (20 mL)
  4. additionThe mixture is added to saturated potassium sodium tartrate (300 mL)
  5. extractionThe mixture is extracted with Et2O (2×200 mL)
  6. dry with materialthe combined organic layers are dried over anhydrous sodium sulfate
  7. customThe solvent is removed
  8. customthe residue is purified by silica gel chromatography (1→10% ethyl acetate/hexane)

Quellen und Nachweise

ORD-Eintrag
ord-9762d2ecb666461d9e6b947f96c2e880
Quelldatensatz
uspto-grants-2011_09
Patentnummer
US08013179B2

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