2,3-Dihydroxybenzoic Acid → 2-(2,3-dihydroxybenzoyl)oxymethyl-5-hydroxy-4H-pyran-4-one

HRID 259845

Reaktionsgleichung

[OH:1][C:2]1[C:10]([OH:11])=[CH:9][CH:8]=[CH:7][C:3]=1[C:4]([OH:6])=[O:5].[OH-].[Na+].[CH:14]1[C:19](=[O:20])[C:18]([OH:21])=[CH:17][O:16][C:15]=1[CH2:22]Cl>>[OH:1][C:2]1[C:10]([OH:11])=[CH:9][CH:8]=[CH:7][C:3]=1[C:4]([O:6][CH2:22][C:15]1[O:16][CH:17]=[C:18]([OH:21])[C:19](=[O:20])[CH:14]=1)=[O:5]

Komponenten

Edukt 3

HCID 192,3-Dihydroxybenzoic Acid

HCID 14798Sodium Hydroxide

HCID 82051Chlorokojic acid

Produkt 1

HCID 224040092-(2,3-dihydroxybenzoyl)oxymethyl-5-hydroxy-4H-pyran-4-oneAusbeute 50,2 %

Versuchsvorschrift

By following the procedure of Example 1 by employing 1.0 g(6.5 mmole) of 2,3-dihydroxybenzoic acid, 0.26 g (8.5 mmole) of sodium hydroxide and 0.92 g(7.6 mmole) of chlorokojic acid, there was obtained 0.8 g(50.2%) of 2-(2,3-dihydroxybenzoyl)oxymethyl-5-hydroxy-4H-pyran-4-one as a solid.

Quellen und Nachweise

ORD-Eintrag: ord-bb4cce7a132f41968238228fa8764417
Quelldatensatz: uspto-grants-1996_06
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US05523421

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