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

HRID 1029695

Reaktionsgleichung

Reaktionsgleichung von HRID 1029695
[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-0b4020e1c0e34382bf467e544ef2337e
Quelldatensatz
uspto-grants-1992_04
Patentnummer
US05102906

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