Sodium borohydride → 2,2-Difluoro-2-phenylethanol
Reaktionsgleichung
C([O:3][C:4](=O)[C:5]([F:13])([F:12])[C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1)C.[BH4-].[Na+]>C(O)C>[F:12][C:5]([F:13])([C:6]1[CH:7]=[CH:8][CH:9]=[CH:10][CH:11]=1)[CH2:4][OH:3]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A stirred mixture of 2.2 g of difluoro-2-phenyl acetic acid ethyl ester (W. J. Middleton, E. M. Bingham, J. Org. Chem., 45, 2883-2887 (1980)), and 0.6 g of sodium borohydride in 75 mL of ethanol was kept at room temperature overnight, concentrated to near dryness under reduced pressure carefully acidified with 20 mL of 5% HCl and extracted into 3×50 mL of dichloromethane. The combined extracts were dried over magnesium sulfate and concentrated under reduced pressure. Drying under vacuum gave 1.7 g of product as an oil: 1H NMR (400 MHz, CDCl3) 7.5 (m, 5H), 4.0 (t, 2H).