Acetic Anhydride → Furo(3,2-b)furan-2,5-dione, 3,6-diphenyl-

HRID 268467Notes

Reaction equation

HRID 268467 reaction equation
[CH:1]1[CH:6]=[CH:5][C:4]([C:7]2[C:21](=[O:22])[O:20]/[C:9](=[C:10](/[C:17]([OH:19])=[O:18])\[C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=3)/[C:8]=2O)=[CH:3][CH:2]=1.C(OC(=O)C)(=O)C>>[CH:14]1[CH:15]=[CH:16][C:11]([C:10]2[C:17](=[O:19])[O:18][C:8]3=[C:7]([C:4]4[CH:5]=[CH:6][CH:1]=[CH:2][CH:3]=4)[C:21]([O:20][C:9]=23)=[O:22])=[CH:12][CH:13]=1

Participants

3

Reactant 2

HCID 7918Acetic AnhydrideHCID 5468251326548-70-9

Product 1

HCID 72617Furo(3,2-b)furan-2,5-dione, 3,6-diphenyl-

Procedure

Pulvinic acid (19.0 g., 0.0616 mol.) was refluxed in 250 ml. of acetic anhydride for 15 minutes. The cooled solution was stirred into 1200 ml. of ice and water and the oily mass was crystallized by stirring in 500 ml. of ethanol. The yellow solid was removed, washed with ethanol and dried to yield pulvinic acid lactone, m.p. 221.5°-223°.

Workup

  1. customof ice and water and the oily mass was crystallized
  2. stirringby stirring in 500 ml
  3. customThe yellow solid was removed
  4. washwashed with ethanol
  5. customdried

Sources & evidence

ORD record
ord-ffbb8fca1e534b84a2c6262d613b08f1
Source dataset
uspto-grants-1976_03
Patent number
US03947580

Reaction notes

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