4-Hydroxy-5-methoxy-1,3-benzenedicarboxaldehyde → 1,2-Dihydroxy-3,5-diformylbenzene

HRID 1195991

Reaktionsgleichung

Reaktionsgleichung von HRID 1195991
[OH:1][C:2]1[C:9]([O:10]C)=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][C:3]=1[CH:12]=[O:13].P(Br)(Br)Br>ClCCl>[OH:1][C:2]1[C:9]([OH:10])=[CH:8][C:5]([CH:6]=[O:7])=[CH:4][C:3]=1[CH:12]=[O:13]

Komponenten

4

Edukt 2

HCID 180354-Hydroxy-5-methoxy-1,3-benzenedicarboxaldehydeHCID 24614Phosphorus tribromide

Produkt 1

HCID 190698721,2-Dihydroxy-3,5-diformylbenzene

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

To a suspension containing 1.8 g of 4-hydroxy-5-methoxy-isophthalaldehyde in 20 ml of dichloromethane was added 35 ml of 1 molar PBr3 in dichloromethane. The mixture was allowed to stand over night at room temperature and poured into ice-water. Dichloromethane was evaporated in vacuo. After cooling the product was filtered and washed with water. Yield 0.94 g (57%), m.p. 192°-195° C.

Aufarbeitung

  1. waitto stand over night at room temperature
  2. customDichloromethane was evaporated in vacuo
  3. temperatureAfter cooling the product
  4. filtrationwas filtered
  5. washwashed with water

Quellen und Nachweise

ORD-Eintrag
ord-f3cd86d51d6b4e82937df041f0da61c8
Quelldatensatz
uspto-grants-1992_05
Patentnummer
US05112861

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