Acetic Acid → 6-(Difluoromethoxy)pyridin-3-amine
Reaction equation
[F:1][CH:2]([F:13])[O:3][C:4]1[CH:9]=[CH:8][C:7]([N+:10]([O-])=O)=[CH:6][N:5]=1.C(O)(=O)C>CO.[Pd]>[F:13][CH:2]([F:1])[O:3][C:4]1[N:5]=[CH:6][C:7]([NH2:10])=[CH:8][CH:9]=1Participants
5
Reactant 2
Product 1
Reagents, catalysts & solvents 2
Procedure
To 2-(difluoromethoxy)-5-nitropyridine (4.7 g, 24.7 mmol) in degassed methanol (100 mL) was added 10% palladium on carbon (500 mg, 0.47 mmol) and the reaction was hydrogenated at atmospheric pressure for 1 hour. To this was added acetic acid (2.83 mL, 49.4 mmol) and the reaction was filtered through Celite and concentrated in vacuo to afford 6-(difluoromethoxy)pyridin-3-amine (6.33 g, 25.9 mmol, 105% yield) as an olive green liquid. 1H NMR (400 MHz, MeOD-d4) δ ppm 7.60 (d, J=2.76 Hz, 1 H), 7.37 (s, 0.5 H), 7.15 (dd, J=8.66, 2.89 Hz, 1 H), 7.00 (s, 0.5H), 6.71 (d, J=8.78 Hz, 1 H).