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

HRID 1579459Notes

Reaction equation

HRID 1579459 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-c7c234473a3e46bc850a2fe3773fd31a
Source dataset
uspto-grants-1976_01
Patent number
US03931207

Reaction notes

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