Thiophene-3,4-dicarboxylic acid → 1H,3H-Thieno[3,4-c]furan-1,3-dione

HRID 1770319

Reaktionsgleichung

Reaktionsgleichung von HRID 1770319
[S:1]1[CH:5]=[C:4]([C:6]([OH:8])=O)[C:3]([C:9]([OH:11])=[O:10])=[CH:2]1>C(OC(=O)C)(=O)C>[S:1]1[CH:2]=[C:3]2[C:9]([O:11][C:6](=[O:8])[C:4]2=[CH:5]1)=[O:10]

Komponenten

3

Edukt 1

HCID 255853Thiophene-3,4-dicarboxylic acid

Produkt 1

HCID 3156081H,3H-Thieno[3,4-c]furan-1,3-dioneAusbeute 98 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 7918Acetic AnhydrideLösungsmittel

Versuchsvorschrift

Thiophene-3,4-dicarboxylic acid (12 g, 0.07 mol) is dissolved in acetic anhydride (60 ml) and heated at the boil for 2.5 hours. The mixture is then evaporated to dryness. 10.55 g (98%) of thiophene-3,4-dicarboxylic anhydride (mp. 147° to 149° C.) are obtained.

Aufarbeitung

  1. temperatureheated at the boil for 2.5 hours
  2. customThe mixture is then evaporated to dryness

Quellen und Nachweise

ORD-Eintrag
ord-606ee7117db8452a930878c7e26b9fdd
Quelldatensatz
uspto-grants-1995_01
Patentnummer
US05386036

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