Hydrochloric Acid → 4-Oxo-5-phenyl-4H-pyran-2-carboxylic acid

Reaktionsgleichung

[O:1]=[C:2]1[C:7]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[CH:6][O:5][C:4]([C:14]([O:16]CC)=[O:15])=[CH:3]1.Cl>>[O:1]=[C:2]1[C:7]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[CH:6][O:5][C:4]([C:14]([OH:16])=[O:15])=[CH:3]1

Komponenten

Edukt 2

HCID 313Hydrochloric Acid

HCID 13091198Ethyl 4-oxo-5-phenyl-4H-pyran-2-carboxylate

Produkt 1

HCID 130911614-Oxo-5-phenyl-4H-pyran-2-carboxylic acid

Versuchsvorschrift

Ethyl 4-oxo-5-phenyl-4H-pyran-2-carboxylate (4.9 g) was heated with concentrated hydrochloric acid (12 ml) on a steam bath for 11/2 hours. The mixture was cooled and the solid title product was recrystallised from ethyl acetate-dimethylformamide (mp 225°-227° C. with decomposition).

Aufarbeitung

temperatureThe mixture was cooled
customthe solid title product was recrystallised from ethyl acetate-dimethylformamide (mp 225°-227° C. with decomposition)

Quellen und Nachweise

ORD-Eintrag: ord-36ff2856ffc34546ab9ae5748c545023
Quelldatensatz: uspto-grants-1982_12
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US04364956

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