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

HRID 31539노트

반응식

HRID 31539 반응식
[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]

참가 물질

3

반응물 2

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

생성물 1

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

실험 절차

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.

후처리

  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

출처 및 근거

ORD 기록
ord-fa3f9b4e43df40f3b8389354eea3dc8f
출처 데이터셋
uspto-grants-2008_09
특허 번호
US07425650B1

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