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

HRID 440350

Reaktionsgleichung

Reaktionsgleichung von HRID 440350
[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-008e67ff95cd4f68ad40055b4987af1f
Quelldatensatz
uspto-grants-1996_05
Patentnummer
US05519029

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