Diethyl Malonate → Diethyl isopentylmalonate

HRID 22417

Reaktionsgleichung

Reaktionsgleichung von HRID 22417
[Na].[C:2]([O:10][CH2:11][CH3:12])(=[O:9])[CH2:3][C:4]([O:6][CH2:7][CH3:8])=[O:5].[O-]CC.[Na+:16].[CH2:17](Br)[CH2:18][CH:19]([CH3:21])[CH3:20]>C(O)C>[O-:5][CH2:4][CH3:3].[Na+:16].[CH2:17]([CH:3]([C:4]([O:6][CH2:7][CH3:8])=[O:5])[C:2]([O:10][CH2:11][CH3:12])=[O:9])[CH2:18][CH:19]([CH3:21])[CH3:20]

Komponenten

7

Edukt 4

HCID 7761Diethyl MalonateHCID 78911-Bromo-3-methylbutaneHCID 2723922Sodium ethoxideHCID 5360545Sodium

Produkt 2

HCID 79384Diethyl isopentylmalonateHCID 2723922Sodium ethoxide

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel2×

Versuchsvorschrift

Sodium ethoxide was prepared from sodium metal (9.1 g) and freshly distilled absolute ethanol (250 ml). Diethyl malonate (63.5 g) was added to sodium ethoxide in ethanol, and the mixture was stirred at 60°-70° C. for 50 min. Isoamyl bromide (60 g) was added, and the reaction mixture was heated under reflux overnight. After the usual work-up, the resulting crude product was distilled under reduced pressure to give diethyl isoamylmalonate. Yield: 71.7 g (78%).

Aufarbeitung

  1. temperaturethe reaction mixture was heated
  2. temperatureunder reflux overnight
  3. distillationAfter the usual work-up, the resulting crude product was distilled under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-ba34f5f565a642ce817fb30dcee7b722
Quelldatensatz
uspto-grants-1995_06
Patentnummer
US05428062

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