4-Nitrophenol → 6-nitro-3,4-dihydro-2H-1-benzopyran-4-one

HRID 981786

Reaktionsgleichung

Reaktionsgleichung von HRID 981786
[CH:1]1[C:6]([N+:7]([O-:9])=[O:8])=[CH:5][CH:4]=[C:3]([OH:10])[CH:2]=1.[C:11](O)(=[O:14])[CH:12]=[CH2:13].C1C2NC3C(=CC=CC=3)SC=2C=CC=1.F>>[N+:7]([C:6]1[CH:5]=[C:4]2[C:3](=[CH:2][CH:1]=1)[O:10][CH2:13][CH2:12][C:11]2=[O:14])([O-:9])=[O:8]

Komponenten

5

Edukt 4

HCID 9804-NitrophenolHCID 6581Acrylic AcidHCID 7108PhenothiazineHCID 14917Hydrofluoric Acid

Produkt 1

HCID 52288316-nitro-3,4-dihydro-2H-1-benzopyran-4-one

Versuchsvorschrift

Following the same procedure as Example 1, p-nitrophenol (34.8 grams), acrylic acid (27 grams), and an inhibitor, phenothiazine (0.02 grams) was added to the pressure reactor. The anhydrous hydrogen fluoride (110 grams) was added before the system was warmed. When the reaction temperature was attained, a pressure of 140 psig was noted, similar to previous reactions. Work-up was carried out as previous examples and the 6-Nitro-4-Chromanone was isolated and characterized.

Aufarbeitung

  1. temperaturewas warmed

Quellen und Nachweise

ORD-Eintrag
ord-da5d1197fd644d779e21cbae81c0ff80
Quelldatensatz
uspto-grants-1991_02
Patentnummer
US04992564

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