反应详情

A mixture of 2-amino-5-bromo-pyridine-3-carbaldehyde (4.00 g, 14.2 mmol), diethyl malonate (21.6 mL, 142 mmol) and piperidine (7.00 mL, 71.0 mmol) in EtOH (70 mL) was heated to reflux overnight. The mixture was cooled to room temperature and the solid was collected by filtration to give the title compound (2.41 g, 57%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ 12.65 (s, 1H), 8.70 (d, J=2.4 Hz, 1H), 8.56 (d, J=2.4 Hz, 1H), 8.45 (s, 1H), 4.29 (q, J=7.1 Hz, 2H), 1.30 (t, J=7.1 Hz, 3H).

1. temperaturewas heated
2. temperatureto reflux overnight
3. filtrationthe solid was collected by filtration