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

HRID 31539ノート

反応式

HRID 31539 の反応式
[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]

参加物

3

反応物 2

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

生成物 1

HCID 3084646[4,5'-Biisobenzofuran]-1,1',3,3'-tetrone収率 90.1%

実験手順

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.

後処理

  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

出典と根拠

ORDレコード
ord-fa3f9b4e43df40f3b8389354eea3dc8f
出典データセット
uspto-grants-2008_09
特許番号
US07425650B1

反応ノート

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