2,5-Dihydroxyterephthalic acid → HCID 178507906, compound

HRID 1994175Notes

Reaction equation

HRID 1994175 reaction equation
Cl.Cl.[NH2:3][C:4]1[CH:9]=[C:8]([NH2:10])[C:7]([OH:11])=[CH:6][C:5]=1[OH:12].[OH:13][C:14]1[CH:22]=[C:21]([C:23]([OH:25])=[O:24])[C:20]([OH:26])=[CH:19][C:15]=1[C:16]([OH:18])=[O:17].OC1C=C(C([O-])=O)C(O)=CC=1C([O-])=O.[Na+].[Na+]>O.[OH-].[Na+]>[NH2:3][C:4]1[CH:9]=[C:8]([NH2:10])[C:7]([OH:11])=[CH:6][C:5]=1[OH:12].[OH:13][C:14]1[CH:22]=[C:21]([C:23]([O-:25])=[O:24])[C:20]([OH:26])=[CH:19][C:15]=1[C:16]([O-:18])=[O:17]

Participants

6

Reactant 3

HCID 691312,5-Dihydroxyterephthalic acidHCID 27336484,6-Diaminoresorcinol Dihydrochloride2×HCID 178524618HCID 178524618, compound

Product 1

HCID 178507906HCID 178507906, compound

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 14798Sodium HydroxideSolvent

Procedure

7 parts by weight of 4,6-diamino-1,3-benzenediol dihydrochloride was dissolved in 33 parts by weight of water deaerated with nitrogen. 6.180 parts by weight of 2,5-dihydroxyterephthalic acid was dissolved in 64 parts by weight of 1M sodium hydroxide solution and deaerated with nitrogen. The 4,6-diamino-1,3-benzenediol dihydrochloride solution was added dropwise to the disodium 2,5-dihydroxyterephthalate solution over 10 minutes to form a white precipitate of 4,6-diamino-1,3-benzenediol/2,5-dihydroxyterephthalate. In this case, the reaction temperature was kept at 90° C. The obtained salt was filtered, dispersed and mixed into 3,000 parts by weight of water deaerated with nitrogen, and then filtered again. This dispersion, mixing and filtration operation was repeated three times.

Sources & evidence

ORD record
ord-5028379e32e74262aea2718d83ab0136
Source dataset
uspto-grants-2010_01
Patent number
US07652124B2

Reaction notes

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