9-hydroxy-1-oxo-1H-naphtho[2,1-b]pyran-2-carboxaldehyde acetate → 9-Hydroxy-1-oxo-1H-naphtho[2,1-b]pyran-2-carboxaldehyde

HRID 2198877Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2198877
C(O)(=O)C.[OH:5][C:6]1[CH:19]=[C:18]2[C:9]([CH:10]=[CH:11][C:12]3[O:13][CH:14]=[C:15]([CH:21]=[O:22])[C:16](=[O:20])[C:17]=32)=[CH:8][CH:7]=1>C(O)=O>[OH:5][C:6]1[CH:19]=[C:18]2[C:9]([CH:10]=[CH:11][C:12]3[O:13][CH:14]=[C:15]([CH:21]=[O:22])[C:16](=[O:20])[C:17]=32)=[CH:8][CH:7]=1

Komponenten

3

Edukt 1

HCID 867372399-hydroxy-1-oxo-1H-naphtho[2,1-b]pyran-2-carboxaldehyde acetate

Produkt 1

HCID 130510419-Hydroxy-1-oxo-1H-naphtho[2,1-b]pyran-2-carboxaldehyde

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 284Formic AcidLösungsmittel

Versuchsvorschrift

Prepared by refluxing 9-hydroxy-1-oxo-1H-naphtho[2,1-b]pyran-2-carboxaldehyde acetate (20.0 g, 0.071 m) in formic acid (250 ml, 88%) for 18 hrs. The product which crystallizes on cooling is filtered, washed with water, with acetone and sucked dry. The crystals are red-brown (16.0 g, 94%), m.p. dec>270° C.

Aufarbeitung

  1. customPrepared
  2. customThe product which crystallizes
  3. temperatureon cooling
  4. filtrationis filtered
  5. washwashed with water, with acetone
  6. customsucked dry
  7. custom(16.0 g, 94%), m.p. dec>270° C.

Quellen und Nachweise

ORD-Eintrag
ord-bc891f424d6b4ae180507409044cfd3d
Quelldatensatz
uspto-grants-1982_11
Patentnummer
US04360527

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