反应详情

温度

90 °C

To a stirred mixture of 5-bromo-6′-methoxy-3-nitro-2,3′-bipyridine (776.9 mg, 2.50 mmol) in EtOAc (25 mL) was added tin(II) chloride dihydrate (2.83 g, 12.56 mmol) in portions. Upon complete addition of the reducing agent, the mixture was carefully heated to 90° C. After 2 h, the reaction was cooled to rt and diluted with EtOAc, then washed with 1M NaOH, water, and brine. After drying over anhydrous sodium sulfate, filtration, and concentration, the light tan solid was identified as 5-bromo-6′-methoxy-2,3′-bipyridin-3-amine. 1H NMR (500 MHz, DMSO-d6) δ ppm 8.42 (1H, dd, J=2.4, 0.7 Hz), 7.98 (2H, m), 7.34 (1H, d, J=2.0 Hz), 6.90 (1H, dd, J=8.6, 0.7 Hz), 5.49 (2H, s), 3.90 (3H, s).

1. additionUpon complete addition of the reducing agent
2. temperaturethe reaction was cooled to rt
3. washwashed with 1M NaOH, water, and brine
4. dry with materialAfter drying over anhydrous sodium sulfate, filtration, and concentration