[Br:1][C:2]1[C:3](/[CH:13]=[CH:14]/[N:15](C)C)=[C:4]([N+]([O-])=O)[C:5]([O:8][CH3:9])=[N:6][CH:7]=1.C(OCC)(=O)C.[H][H]>[Ni].O>[Br:1][C:2]1[CH:7]=[N:6][C:5]([O:8][CH3:9])=[C:4]2[NH:15][CH:14]=[CH:13][C:3]=12
(E)-2-(5-bromo-2-methoxy-3-nitropyridin-4-yl)-N,N-dimethylethenamine (13.9 g, 45.8 mmol) and ethyl acetate (150 mL) were added to Ra-Ni 2800 (pre-washed with ethanol), water slurry (6.9 g, 118 mmol) in a stainless steel pressure bottle and stirred for 30 minutes at 30 psi of hydrogen and room temperature. The reaction mixture was filtered, and concentrated. The residue was triturated with dichloromethane, and the solid collected by filtration to provide 4-bromo-7-methoxy-1H-pyrrolo[2,3-c]pyridine (5.82 g). The mother liquor was evaporated and the residue triturated again with dichloromethane and filtered to provide an additional 1.63 g of 4-bromo-7-methoxy-1H-pyrrolo[2,3-c]pyridine. Total yield=7.45 g, 72% yield.
Loading…
