Acetic Acid → Diethyl 3-ethyl-5-oxo-2,2-pyrrolidinedicarboxylate

HRID 640071Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 640071
[Na].[C:2]([NH:5][CH:6]([C:12]([O:14][CH2:15][CH3:16])=[O:13])[C:7]([O:9][CH2:10][CH3:11])=[O:8])(=[O:4])[CH3:3].C(O[C:20](=O)/[CH:21]=[CH:22]/CC)C.C(O)(=O)C>C(O)C>[CH2:10]([O:9][C:7]([C:6]1([C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:20]([CH2:21][CH3:22])[CH2:3][C:2](=[O:4])[NH:5]1)=[O:8])[CH3:11]

Komponenten

6

Edukt 4

HCID 176Acetic AcidHCID 14041Acetamidomalonic acid diethyl esterHCID 5360545SodiumHCID 5367761Ethyl trans-2-pentenoate

Produkt 1

HCID 255944Diethyl 3-ethyl-5-oxo-2,2-pyrrolidinedicarboxylateAusbeute 87,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

To 150 mg of sodium dissolved in 150 mL of absolute ethanol was added diethyl acetamidomalonate (5.3 g, 25 mmol) and ethyl-(2E)-pent-2-enoate (3.5 g, 27.3 mmol). The reaction mixture was then refluxed for 20 h. After this period of time, 2 mL of glacial acetic acid was added, volatiles were removed under pressure with the aid of a water aspirator and heating bath. On cooling the residue solidified. The residue was dissolved in 50 mL of toluene and to this was added 20 mL of petroleum ether. The product precipitated when the mixture was cooled. The crystals were collected and washed with water and further dried in vacuo to obtain a white solid (5.6 g, 79.77%). Mass Spectrum (+ESI): 258 (M+H)+.

Aufarbeitung

  1. temperatureThe reaction mixture was then refluxed for 20 h
  2. customvolatiles were removed under pressure with the aid of a water aspirator
  3. temperatureheating bath
  4. temperatureOn cooling the residue solidified
  5. dissolutionThe residue was dissolved in 50 mL of toluene
  6. additionto this was added 20 mL of petroleum ether
  7. customThe product precipitated when the mixture
  8. temperaturewas cooled
  9. customThe crystals were collected
  10. washwashed with water
  11. customfurther dried in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-45ae26d02dc747afab8236f1d1b5ab4a
Quelldatensatz
uspto-grants-2010_04
Patentnummer
US07691884B2

Notizen zur Reaktion

Wird geladen…