3,4-Dimethoxystyrene → 4-Ethyl-1,2-dimethoxybenzene

HRID 249258

Reaktionsgleichung

Reaktionsgleichung von HRID 249258
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:8]=[CH:9][C:10]=1[O:11][CH3:12])[CH:6]=[CH2:7].[H][H]>[Pd].CO>[CH2:6]([C:5]1[CH:4]=[C:3]([O:2][CH3:1])[C:10]([O:11][CH3:12])=[CH:9][CH:8]=1)[CH3:7]

Komponenten

5

Edukt 2

HCID 614003,4-DimethoxystyreneHCID 178418361HCID 178418361, Verbindung

Produkt 1

HCID 799904-Ethyl-1,2-dimethoxybenzeneAusbeute 98,8 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 887MethanolLösungsmittel

Versuchsvorschrift

In an atmospheric pressure hydrogenation equipment 10.0 g (60.9 mM) of 3,4-dimethoxystyrene, 0.5 g of palladium charcoal and 200 ml of methanol were charged and introduced with hydrogen. The reaction was continued until the absorption of hydrogen was terminated. Palladium charcoal was filtered off from the reaction mixture. Methanol was distilled off from the filtrate. The residue was distilled under vacuum to obtain 10.0 g (60.2 mM) of 4-ethylveratrole as a colorless transparent liquid having a boiling point of 84°-85° C./2 mmHg

Aufarbeitung

  1. customThe reaction was continued until the absorption of hydrogen
  2. customwas terminated
  3. filtrationPalladium charcoal was filtered off from the reaction mixture
  4. distillationMethanol was distilled off from the filtrate
  5. distillationThe residue was distilled under vacuum

Quellen und Nachweise

ORD-Eintrag
ord-9400cf6935fd4987b8dff9019bab3247
Quelldatensatz
uspto-grants-1993_05
Patentnummer
US05214034

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