Methane → 3-(3,4-dimethylphenyl)propanoic Acid

Reaktionsgleichung

[CH3:1][C:2]1[CH:3]=[C:4]([CH:9]=[CH:10][C:11]([OH:13])=[O:12])[CH:5]=[CH:6][C:7]=1[CH3:8].C>[Pd].CO>[CH3:1][C:2]1[CH:3]=[C:4]([CH2:9][CH2:10][C:11]([OH:13])=[O:12])[CH:5]=[CH:6][C:7]=1[CH3:8]

Komponenten

Versuchsvorschrift

A mixture of 3-(3,4-dimethyl-phenyl)-acrylic acid (19.269 g; 109.355 mmol) and 10% palladium over activated charcoal (1.920 g) was placed under nitrogen before MeOH (300 ml) was carefully added. The resulting suspension was placed under vacuum, then under hydrogen (1 atm), and the reaction mixture was vigorously stirred at rt for 4 h. The reaction mixture was filtered over a pad of celite, and concentrated under reduced pressure to give the expected product 3-(3,4-dimethyl-phenyl)-propionic acid as a grey solid which was further dried under HV (19.070 g; 98%). LC-MS: tR=0.85 min; [M+H]+: no ionisation.