Cinchomeronic acid → 1H,3H-furo(3,4-c)pyridine-1,3-dione

HRID 234804

Reaktionsgleichung

Reaktionsgleichung von HRID 234804
[N:1]1[CH:6]=[CH:5][C:4]([C:7]([OH:9])=O)=[C:3]([C:10]([OH:12])=[O:11])[CH:2]=1>C(OC(=O)C)(=O)C>[N:1]1[CH:6]=[CH:5][C:4]2[C:7]([O:12][C:10](=[O:11])[C:3]=2[CH:2]=1)=[O:9]

Komponenten

3

Edukt 1

HCID 10273Cinchomeronic acid

Produkt 1

HCID 2783981H,3H-furo(3,4-c)pyridine-1,3-dioneAusbeute 75,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 7918Acetic AnhydrideLösungsmittel

Versuchsvorschrift

A mixture of pyridine 3,4-dicarboxylic acid (15.0 g) and acetic anhydride (30 mL) is refluxed for two hours. The excess acetic anhydride is removed by distillation and the anhydride is collected and purified by sublimation (123° C. at 3 mm Hg) to yield pyridine 3,4-dicarboxylic acid anhydride as a white solid (10.1 g).

Aufarbeitung

  1. temperatureis refluxed for two hours
  2. customThe excess acetic anhydride is removed by distillation
  3. customthe anhydride is collected
  4. custompurified by sublimation (123° C. at 3 mm Hg)

Quellen und Nachweise

ORD-Eintrag
ord-4dc1f62024d04909a387aae886214db3
Quelldatensatz
uspto-grants-1997_01
Patentnummer
US05596097

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