Phthalic Anhydride → Pyromellitic dianhydride

HRID 1895842Notes

Reaction equation

HRID 1895842 reaction equation
[C:1]1(=[O:11])[O:6][C:4](=[O:5])[C:3]2=[CH:7][CH:8]=[CH:9][CH:10]=[C:2]12>CN(C=O)C>[CH:7]1[C:3]2[C:4]([O:6][C:1](=[O:11])[C:2]=2[CH:10]=[C:9]2[C:4]([O:6][C:1](=[O:11])[C:8]=12)=[O:5])=[O:5]

Participants

3

Reactant 1

HCID 6811Phthalic Anhydride

Product 1

HCID 6966Pyromellitic dianhydride

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A polyamic acid of PMDA/ODA in DMF was prepared at 97% stoichiometry and 23.5% solids by weight. The amic acid was end-capped with phthalic anhydride at 0.04% by weight. (need to confirm)

Sources & evidence

ORD record
ord-40ed06ed8ffd4c01a2672d41b733963f
Source dataset
uspto-grants-2013_08
Patent number
US08518525B2

Reaction notes

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