[O:1]([C:8]1[CH:13]=[CH:12][N:11]=[CH:10][C:9]=1[CH2:14][OH:15])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1>C1COCC1.O=[Mn]=O>[O:1]([C:8]1[C:9]([CH:14]=[O:15])=[CH:10][N:11]=[CH:12][CH:13]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1MnO2 (289 mg, 3.33 mmol) was added to a solution of (4-phenoxypyridin-3-yl)methanol (70 mg, 0.33 mmol) in THF (10 mL). After stiffing overnight the reaction mixture was filtered (celite). Removal of the solvent provided 4-phenoxynicotinaldehyde (70 mg, 95%). MS [M+H]+=200.1.
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