1,2,3,4-Cyclobutanetetracarboxylic Acid → 1,2,3,4-Cyclobutanetetracarboxylic dianhydride

HRID 749626Notes

Reaction equation

HRID 749626 reaction equation
[CH:1]1([C:14]([OH:16])=[O:15])[CH:4]([C:5]([OH:7])=O)[CH:3]([C:8]([OH:10])=O)[CH:2]1[C:11]([OH:13])=[O:12]>C(OC(=O)C)(=O)C>[CH:1]12[C:14](=[O:15])[O:16][C:5](=[O:7])[CH:4]1[CH:3]1[C:8](=[O:10])[O:12][C:11](=[O:13])[CH:2]12

Participants

3

Reactant 1

HCID 2660341,2,3,4-Cyclobutanetetracarboxylic Acid

Product 1

HCID 1072801,2,3,4-Cyclobutanetetracarboxylic dianhydrideYield 135.6%

Reagents, catalysts & solvents 1

HCID 7918Acetic AnhydrideSolvent

Procedure

The cyclobutane-1,2,3,4-tetracarboxylic acid (501 g, 2.16 mol) and acetic anhydride (3000 ml) were added to a 5-liter flask and reacted at a controlled temperature of 150° C. for 24 hours. The reaction was cooled to room temperature; concentrated; and dried to obtain 1,2,3,4-cyclobutanetetracarboxylic dianhydride (573 g, 2.93 mol).

Workup

  1. customreacted at a controlled temperature of 150° C. for 24 hours
  2. concentrationconcentrated
  3. customand dried

Sources & evidence

ORD record
ord-274db99385e444e78b011dc173834366
Source dataset
uspto-grants-2008_07
Patent number
US07402693B2

Reaction notes

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