Diazomethane → 4-[[2-(1,1-Dimethylethoxy)-2-oxoethyl]oxy]-alpha-methyl-benzenepropanoic acid, methyl ester

HRID 248078Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 248078
[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

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

  1. washWash with saturated sodium hydrogen carbonate (2×300 mL) and brine (300 mL)
  2. dry with materialDry (MgSO4)
  3. customevaporate the solvent in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-cb03b59edc6f49b58f2d6387d49e8bb5
Quelldatensatz
uspto-grants-1993_05
Patentnummer
US05208240

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