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

HRID 1287530Notes

Reaction equation

HRID 1287530 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-b6004250e32a43d095872557862570b5
Source dataset
uspto-grants-1976_10
Patent number
US03984559

Reaction notes

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