Guaiacol → Diethyl (2-methoxyphenoxy)propanedioate

HRID 327653

Reaktionsgleichung

Reaktionsgleichung von HRID 327653
[Na].[C:2]1([O:9][CH3:10])[C:3](=[CH:5][CH:6]=[CH:7][CH:8]=1)[OH:4].[CH2:11]([O:13][C:14](=[O:22])[CH:15](Cl)[C:16]([O:18][CH2:19][CH3:20])=[O:17])[CH3:12]>C(O)C>[CH2:11]([O:13][C:14](=[O:22])[CH:15]([O:4][C:3]1[CH:5]=[CH:6][CH:7]=[CH:8][C:2]=1[O:9][CH3:10])[C:16]([O:18][CH2:19][CH3:20])=[O:17])[CH3:12]

Komponenten

5

Edukt 3

HCID 460GuaiacolHCID 84182Diethyl chloromalonateHCID 5360545Sodium

Produkt 1

HCID 11140560Diethyl (2-methoxyphenoxy)propanedioate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel3×

Versuchsvorschrift

To a solution of 6.9 g (0.3 mole) of sodium pellets dissolved in 400 ml of absolute ethanol was successively added a solution of 37.9 g (0.305 mole) of guaiacol in 50 ml of ethanol followed by a solution of 68.1 g (0.35 mole) of diethylchloromalonate in 50 ml of ethanol. The mixture was heated at reflux for 28 hr and then stirred at ambient temperature for 3 days. The mixture was filtered and the filtrate was concentrated. The residue was partitioned between salt water and ethyl ether. The layers were separated and the aqueous layer was extracted twice with 150 ml portions of ethyl ether. The combined organic layers were washed with brine, dried (sodium sulfate0 and concentrated to give a yellow oil. The oil was subjected to vacuum distillation and 66.6 g (79%) of the title compound was collected as a clear oil, bp 136°-153° C. at 0.3 mm.

Aufarbeitung

  1. temperatureThe mixture was heated
  2. temperatureat reflux for 28 hr
  3. filtrationThe mixture was filtered
  4. concentrationthe filtrate was concentrated
  5. customThe residue was partitioned between salt water and ethyl ether
  6. customThe layers were separated
  7. extractionthe aqueous layer was extracted twice with 150 ml portions of ethyl ether
  8. washThe combined organic layers were washed with brine
  9. dry with materialdried (sodium sulfate0
  10. concentrationconcentrated
  11. customto give a yellow oil
  12. distillationThe oil was subjected to vacuum distillation and 66.6 g (79%) of the title compound
  13. customwas collected as a clear oil, bp 136°-153° C. at 0.3 mm

Quellen und Nachweise

ORD-Eintrag
ord-706d4735511c4c6da38794851e9015dd
Quelldatensatz
uspto-grants-1993_12
Patentnummer
US05273993

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