Methyl acetoacetate → 3-Furancarboxylic acid, 2,5-dimethyl-, methyl ester

HRID 1706337

Reaktionsgleichung

Reaktionsgleichung von HRID 1706337
[C:1]([O:7][CH3:8])(=[O:6])[CH2:2][C:3]([CH3:5])=[O:4].C(O[CH:13]([CH3:16])[CH:14]=O)(=O)C>[Fe].CO>[CH3:8][O:7][C:1]([C:2]1[CH:14]=[C:13]([CH3:16])[O:4][C:3]=1[CH3:5])=[O:6]

Komponenten

5

Edukt 2

HCID 7757Methyl acetoacetateHCID 907282-(Acetyloxy)propanal

Produkt 1

HCID 802483-Furancarboxylic acid, 2,5-dimethyl-, methyl ester

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23925IronKatalysatorHCID 887MethanolLösungsmittel

Reaktionsbedingungen

Temperatur
20 °C

Versuchsvorschrift

27 parts by weight of anhydrous iron-III chloride are added to a solution of 116 parts by weight of methyl acetoacetate in 120 parts by weight of methanol and thereafter 149 parts by weight of 85.5 percent strength α-acetoxypropionaldehyde are added dropwise, sufficiently slowly that the temperature does not rise above 37° C. The mixture is stirred overnight at room temperature (20° C.), is then boiled for 2 hours, and, when it has cooled, is worked up as described in Example 1. Distillation gives 116.6 parts by weight of 2,5-dimethylfuran-3-carboxylic acid methyl ester.

Aufarbeitung

  1. customdoes not rise above 37° C
  2. waitis then boiled for 2 hours
  3. temperaturewhen it has cooled
  4. distillationDistillation

Quellen und Nachweise

ORD-Eintrag
ord-30828b858241423fa202fd29149a5bd0
Quelldatensatz
uspto-grants-1980_06
Patentnummer
US04207243

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