Methyl phenylacetate → HCID 67917566, Verbindung
Reaktionsgleichung
[C:1]1([CH2:7][C:8]([O:10][CH3:11])=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[H-].[Na+].[C:14](=O)([O-])[O-:15].[Na+].[Na+]>C(OC)=O.CN(C=O)C>[OH:15][CH:14]=[C:7]([C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1)[C:8]([O:10][CH3:11])=[O:9]Komponenten
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 2
Reaktionsbedingungen
- Temperatur
- -5 °C
Versuchsvorschrift
A solution of methyl phenylacetate (16.03g) in methyl formate (132ml) and dry DMF (100 ml) was added dropwise over 40 minutes to a stirred suspension of sodium hydride (5.14g) in dry DMF (200ml) at between 0° and 5° C. (effervescence and foaming). The resulting mixture was stirred at about -5° C. for 30 minutes, diluted with dry DMF (250ml), then allowed to warm and stir at room temperature for 3 hours. Ice and sodium carbonate were added to the mixture and it was washed with ether (x2), then acidified with concentrated hydrochloric acid and extracted with ether (x4). The extracts were washed with water (x3), treated with magnesium sulphate and charcoal, filtered and concentrated to give methyl 3-hydroxy-2-phenylpropenoate (13.56g, 71%) as a solid, m.p. 33.5°-35.5° C., which was used for the subsequent steps without further purification.
Aufarbeitung
- temperatureto warm
- stirringstir at room temperature for 3 hours
- washwas washed with ether (x2)
- extractionextracted with ether (x4)
- washThe extracts were washed with water (x3)
- additiontreated with magnesium sulphate and charcoal
- filtrationfiltered
- concentrationconcentrated
Quellen und Nachweise
- ORD-Eintrag
- ord-9a8b399dc2cc4d2ca863a9031732fc22
- Quelldatensatz
- uspto-grants-1992_09
- Patentnummer
- US05145954
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