Acetic Anhydride → [4,5'-Biisobenzofuran]-1,1',3,3'-tetrone

HRID 31539Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 31539
[C:1]1([C:13]2[CH:18]=[CH:17][C:16]([C:19]([OH:21])=[O:20])=[C:15]([C:22]([OH:24])=O)[CH:14]=2)[CH:6]=[CH:5][CH:4]=[C:3]([C:7](O)=[O:8])[C:2]=1[C:10]([OH:12])=[O:11].C(OC(=O)C)(=O)C>>[CH:5]1[CH:4]=[C:3]2[C:7]([O:11][C:10](=[O:12])[C:2]2=[C:1]([C:13]2[CH:18]=[CH:17][C:16]3[C:19]([O:21][C:22](=[O:24])[C:15]=3[CH:14]=2)=[O:20])[CH:6]=1)=[O:8]

Komponenten

3

Edukt 2

HCID 7918Acetic AnhydrideHCID 100195031,1'-Biphenyl-2,3',3,4'-tetracarboxylic acid

Produkt 1

HCID 3084646[4,5'-Biisobenzofuran]-1,1',3,3'-tetroneAusbeute 90,1 %

Versuchsvorschrift

2,3,3′,4′-Biphenyltetracarboxylic acid (4) (33 gm, 100 mmol) was suspended in minimum amount of acetic anhydride and heated to reflux for 4 hours. The reaction mixture was cooled to room temperature. The corresponding dianhydride precipitated out and was collected and washed with ether to remove trace of acetic acid before drying under vacuum to afford 26.5 g (90%) of a-BPDA. Mp=195-196° C.

Aufarbeitung

  1. temperatureheated
  2. temperatureto reflux for 4 hours
  3. customThe corresponding dianhydride precipitated out
  4. customwas collected
  5. washwashed with ether
  6. customto remove trace of acetic acid
  7. custombefore drying under vacuum

Quellen und Nachweise

ORD-Eintrag
ord-fa3f9b4e43df40f3b8389354eea3dc8f
Quelldatensatz
uspto-grants-2008_09
Patentnummer
US07425650B1

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