Carbon Dioxide → Diethyl Pyrocarbonate

HRID 1091171

Reaktionsgleichung

Reaktionsgleichung von HRID 1091171
[C:1](=[O:6])([O-:5])[O:2][CH2:3][CH3:4].[Na+:7].C(OC([O-])=O)(=O)[O-].[O-]CC.[Na+].[Na].C(=O)=O.[Cl:23][C:24]([O:26][CH2:27][CH3:28])=[O:25]>C1(C)C=CC=CC=1.C(O)C>[C:1]([O:5][C:24]([O:26][CH2:27][CH3:28])=[O:25])(=[O:6])[O:2][CH2:3][CH3:4].[Cl-:23].[Na+:7]

Komponenten

10

Edukt 6

HCID 280Carbon DioxideHCID 10928Ethyl chloroformateHCID 2723922Sodium ethoxideHCID 5360545SodiumHCID 15238643PyrocarbonateHCID 23677505Sodium ethyl carbonate3×

Produkt 2

HCID 3051Diethyl PyrocarbonateHCID 5234Sodium Chloride

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 702EthanolLösungsmittelHCID 1140TolueneLösungsmittel

Versuchsvorschrift

The dialkyl pyrocarbonates may be prepared by reacting alkali metal alkyl carbonate, e.g., sodium ethyl carbonate, with alkyl halocarbonate, e.g., ethyl chlorocarbonate (ethyl chloroformate). The alkyl groups of the alkyl carbonate and halocarbonate are chosen to correspond to the alkyl group desired for the pyrocarbonate. For example, sodium ethoxide, which can be prepared by dissolving sodium metal in toluene solution of ethyl alcohol, is carbonated with carbon dioxide to prepare sodium ethyl carbonate. Thereafter, the sodium ethyl carbonate is reacted with ethyl chloroformate to form diethyl pyrocarbonate and sodium chloride. The chloride salt is filtered and the pyrocarbonate recovered by distillation.

Quellen und Nachweise

ORD-Eintrag
ord-e6af996c91c948b8bc00e2bf5be404ae
Quelldatensatz
uspto-grants-1992_01
Patentnummer
US05084529

Verknüpfte Notizen

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