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

HRID 1757671

Reaktionsgleichung

Reaktionsgleichung von HRID 1757671
[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 6344DichloromethaneLösungsmittel3×

Versuchsvorschrift

To a suspension containing 1.8 g of 4-hydroxy-5-methoxyisophthalaldehyde in20 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 wash. Yield 0.94 g (57%), m.p. 192°-195° C.

Aufarbeitung

  1. waitto stand over night at room temperature
  2. customwas evaporated in vacuo
  3. temperatureAfter cooling the product
  4. filtrationwas filtered
  5. washwashed
  6. washwith wash

Quellen und Nachweise

ORD-Eintrag
ord-1b025bda98fb4170a232b35a2b9b6b91
Quelldatensatz
uspto-grants-1995_08
Patentnummer
US05446194

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