Sodium borohydride → 4-Hydroxy-1-(2-methoxy-ethyl)-cyclohexanecarboxylic acid ethyl ester
Reaktionsgleichung
[CH2:1]([O:3][C:4]([C:6]1([CH2:13][CH2:14][O:15][CH3:16])[CH2:11][CH2:10][C:9](=[O:12])[CH2:8][CH2:7]1)=[O:5])[CH3:2].[BH4-].[Na+]>CC(O)C>[CH2:1]([O:3][C:4]([C:6]1([CH2:13][CH2:14][O:15][CH3:16])[CH2:11][CH2:10][CH:9]([OH:12])[CH2:8][CH2:7]1)=[O:5])[CH3:2]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 0 °C
Versuchsvorschrift
1-(2-Methoxy-ethyl)-4-oxo-cyclohexanecarboxylic acid ethyl ester (1.60 g) was dissolved in 2-propanol (25 mL) The mixture was cooled to 0° C. and sodium borohydride (331 mg) was added in 3 portions over 10 minutes. Stirring was continued for 2 hours at 0° C. The reaction mixture was poured into ice/water and extracted two times with ethyl acetate. The combined organic layers were washed with brine, dried over Na2SO4, filtered and the solvent was evaporated. The title compound was obtained as an inseparable mixture of cis and trans diastereomeres (ratio: 3/1) as a light yellow liquid (1.58 g, 98%). This mixture was used without further purification. MS (EI)=230.0 [MH+].