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

HRID 1451471

Reaktionsgleichung

Reaktionsgleichung von HRID 1451471
[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-26848a4e1a04400080d48a23d17b4fcf
Quelldatensatz
uspto-grants-1997_02
Patentnummer
US05604246

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