3-(4-Benzyloxyphenyl)-2-ethoxypropanoic acid ethyl ester → Ethyl 2-ethoxy-3-(4-hydroxyphenyl)propanoate

HRID 1354888Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1354888
[CH2:1]([O:3][CH:4]([CH2:10][C:11]1[CH:16]=[CH:15][C:14]([O:17]CC2C=CC=CC=2)=[CH:13][CH:12]=1)[C:5]([O:7][CH2:8][CH3:9])=[O:6])[CH3:2].[H][H]>[Pd].S1CCOCC1>[CH2:1]([O:3][CH:4]([CH2:10][C:11]1[CH:12]=[CH:13][C:14]([OH:17])=[CH:15][CH:16]=1)[C:5]([O:7][CH2:8][CH3:9])=[O:6])[CH3:2]

Komponenten

5

Edukt 2

HCID 110779683-(4-Benzyloxyphenyl)-2-ethoxypropanoic acid ethyl esterHCID 178418361HCID 178418361, Verbindung

Produkt 1

HCID 11791243Ethyl 2-ethoxy-3-(4-hydroxyphenyl)propanoateAusbeute 97 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 275961,4-OxathianeLösungsmittel

Versuchsvorschrift

A mixture of racemic ethyl 2oxy-3-(4-benzyloxyphenyl)propionate of the formula (12a) (40 g) obtained according to the procedure described in step (iv) above, 5% Pd/C catalyst (8 g) and 1,4-thioxane (200 ml) was subjected to hydrogenation at room temperature and 50–60 psi of hydrogen pressure for a period of 8–12 h. The progress of the reaction was monitored by TLC. After completion of the reaction, the catalyst was filtered off and the solvent was removed under reduced pressure to afford the title compound of the formula (13a) (28–29 g, 97–98%).,

Aufarbeitung

  1. customobtained
  2. customwas subjected to hydrogenation at room temperature
  3. customAfter completion of the reaction
  4. filtrationthe catalyst was filtered off
  5. customthe solvent was removed under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-b8e5f116950147cf9a865c6a834c27c4
Quelldatensatz
uspto-grants-2007_05
Patentnummer
US07223881B2

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