4-Aminophthalic acid → 4-(Dimethylmaleinimidyl)-phthalic anhydride

HRID 971457

Reaction equation

HRID 971457 reaction equation
[Na][Na].N[C:4]1C=C[CH:10]=[C:6]([C:7](O)=[O:8])[C:5]=1[C:13](O)=[O:14].[NH2:16][C:17]1[CH:18]=[C:19]([C:26]([OH:28])=[O:27])[C:20](=[CH:24][CH:25]=1)[C:21]([OH:23])=O>>[CH3:4][C:5]1[C:13](=[O:14])[N:16]([C:17]2[CH:18]=[C:19]3[C:26](=[O:27])[O:28][C:21](=[O:23])[C:20]3=[CH:24][CH:25]=2)[C:7](=[O:8])[C:6]=1[CH3:10]

Participants

4

Reactant 3

HCID 729124-Aminophthalic acidHCID 794903-Aminophthalic acidHCID 141233Disodium2×

Product 1

HCID 540305214-(Dimethylmaleinimidyl)-phthalic anhydride

Procedure

If instead of 22.5 g of the disodium salt of 3-aminophthalic acid, an equivalent amount of the disodium salt of 4-aminophthalic acid is employed and in other respects the procedure indicated in the above example is followed, 4-(di-methylmaleinimidyl)-phthalic anhydride of melting point 197° C. is obtained.

Sources & evidence

ORD record
ord-ef0992791dcc47e5ac8efd1e9100b14f
Source dataset
uspto-grants-1979_07
Patent number
US04160081

Linked notes

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