Sodium Sulfate → 2,2-diethoxypropan-1-ol

HRID 1271800Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1271800
[CH2:1]([O:3][C:4]([O:11][CH2:12][CH3:13])([CH3:10])[C:5](OCC)=[O:6])[CH3:2].[H-].[Al+3].[Li+].[H-].[H-].[H-].S([O-])([O-])(=O)=O.[Na+].[Na+]>C(OCC)C>[CH2:1]([O:3][C:4]([O:11][CH2:12][CH3:13])([CH3:10])[CH2:5][OH:6])[CH3:2]

Komponenten

5

Edukt 3

HCID 24436Sodium SulfateHCID 95835Ethyl 2,2-diethoxypropionateHCID 21226445Aluminium lithium hydride

Produkt 1

HCID 117010602,2-diethoxypropan-1-olAusbeute 76,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 3283Diethyl EtherLösungsmittel2×

Versuchsvorschrift

A solution of ethyl pyruvate diethyl ketal (16.0 g, 0.084 moles) in ethyl ether (60 mL) was added dropwise during 30 min to a stirred solution of lithium aluminum hydride (1.90 g, 0.050 moles) in ethyl ether (150 mL). Next the mixture was stirred 1 h at room temperature under nitrogen atmosphere. Saturated solution of sodium sulfate (20 mL) was added and the mixture was stirred 15 min. Next the mixture was filtered, dried with anhydrous magnesium sulfate, and the solvent was distilled off. The residue was subjected to fractional vacuum distillation giving 9.5 g of pure 2,2-diethoxypropan-1-ol. NMR (d6-DMSO): 1.17 ppm (t, —CH3, ethyl (ketal), 6H), 1.31 ppm (s, —CH3—C—CH2OH, 3H), 3.37 ppm (q, —OCH2CH3, (ketal), 4H), 3.86 ppm (d, —CH2OH, 2H), 4.45 ppm (t, —OH, 1H).

Aufarbeitung

  1. stirringthe mixture was stirred 15 min
  2. filtrationNext the mixture was filtered
  3. dry with materialdried with anhydrous magnesium sulfate
  4. distillationthe solvent was distilled off
  5. distillationThe residue was subjected to fractional vacuum distillation

Quellen und Nachweise

ORD-Eintrag
ord-c0819d9a097d4390b2423468d5268f55
Quelldatensatz
uspto-grants-2007_04
Patentnummer
US07208145B2

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