Diazomethane → 4-[[2-(1,1-Dimethylethoxy)-2-oxoethyl]oxy]-alpha-methyl-benzenepropanoic acid, methyl ester
Reaktionsgleichung
[CH3:1][C:2]([CH3:21])([O:4][C:5](=[O:20])[CH2:6][O:7][C:8]1[CH:13]=[CH:12][C:11]([CH2:14][CH:15]([CH3:19])[C:16]([OH:18])=[O:17])=[CH:10][CH:9]=1)[CH3:3].[N+](=[CH2:24])=[N-]>C(OCC)C>[CH3:3][C:2]([CH3:1])([O:4][C:5](=[O:20])[CH2:6][O:7][C:8]1[CH:13]=[CH:12][C:11]([CH2:14][CH:15]([CH3:19])[C:16]([O:18][CH3:24])=[O:17])=[CH:10][CH:9]=1)[CH3:21]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
Dissolve (+)-4-[[2-(1,1-dimethylethoxy)-2-oxoethyl]oxy]-alpha-methyl-benzenepropanoic acid (90% ee) (6.04 g, 20.5 mmol) in ethyl ether (400 mL) and treat with excess diazomethane. Wash with saturated sodium hydrogen carbonate (2×300 mL) and brine (300 mL). Dry (MgSO4) and evaporate the solvent in vacuo to give (+)-4-[[2-(1,1-dimethylethoxy)-2-oxoethyl]oxy]-alpha-methyl-benzenepropanoic acid, methyl ester (5.85 g).
Aufarbeitung
- washWash with saturated sodium hydrogen carbonate (2×300 mL) and brine (300 mL)
- dry with materialDry (MgSO4)
- customevaporate the solvent in vacuo
Quellen und Nachweise
- ORD-Eintrag
- ord-cb03b59edc6f49b58f2d6387d49e8bb5
- Quelldatensatz
- uspto-grants-1993_05
- Patentnummer
- US05208240
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