(6-Benzyloxy-pyridin-3-yloxy)-acetic acid ethyl ester → (6-Hydroxy-pyridin-3-yloxy)-acetic acid ethyl ester
反応式
[CH2:1]([O:3][C:4](=[O:21])[CH2:5][O:6][C:7]1[CH:8]=[N:9][C:10]([O:13]CC2C=CC=CC=2)=[CH:11][CH:12]=1)[CH3:2]>[Pd]>[CH2:1]([O:3][C:4](=[O:21])[CH2:5][O:6][C:7]1[CH:8]=[N:9][C:10]([OH:13])=[CH:11][CH:12]=1)[CH3:2]参加物
3
実験手順
The suspension of 0.64 g (2.23 mmol) (6-benzyloxy-pyridin-3-yloxy)-acetic acid ethyl ester and 0.064 g 10% palladium on charcoal was hydrogenated for 1 h at 1.7 bar. The reaction mixture was filtered over Dicalite Speed Plus, washed with ethanol and the filtrate was treated with silica gel and evaporated. The residue was purified by silica gel chromatography using a MPLC system (CombiFlash Companion, Isco Inc.) with a gradient from heptane:ethyl acetate (100:0 to 0:100) followed by ethyl acetate:methanol (100:0 to 50:50) to give the product as a colorless solid (91%). MS (Turbo Spray): m/z=198.0 [M+H].