HCID 12401704, Verbindung → 4-oxo-4H-chromene-2-carbaldehyde

HRID 1447987Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1447987
C[O:2][CH:3](OC)[C:4]1[O:5][C:6]2[CH:14]=[CH:13][CH:12]=[CH:11][C:7]=2[C:8](=[O:10])[CH:9]=1>Cl>[O:5]1[C:6]2[CH:14]=[CH:13][CH:12]=[CH:11][C:7]=2[C:8](=[O:10])[CH:9]=[C:4]1[CH:3]=[O:2]

Komponenten

3

Edukt 1

HCID 12401704HCID 12401704, Verbindung

Produkt 1

HCID 104196624-oxo-4H-chromene-2-carbaldehydeAusbeute 81,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 313Hydrochloric AcidLösungsmittel

Versuchsvorschrift

A stirred solution of 2-(dimethoxymethyl)-4H-1-benzopyran-4-one (1.1 g, 0.005 m) in 5 N hydrochloric acid (20 ml) was heated at 100° for 3 hours. The reaction mixture was cooled and extracted with CHCl3. The extracts were dried over MgSO4 and evaporated under reduced pressure to give a crystalline product. Recrystallization from ethyl acetate gave off-white crystals (710 mg, 81%), m.p. 159°-161°.

Aufarbeitung

  1. temperatureThe reaction mixture was cooled
  2. extractionextracted with CHCl3
  3. dry with materialThe extracts were dried over MgSO4
  4. customevaporated under reduced pressure
  5. customto give a crystalline product
  6. customRecrystallization from ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-a1fd200c02da465981ea0f2a628e5cbc
Quelldatensatz
uspto-grants-1979_12
Patentnummer
US04179447

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