反应详情

温度

200 °C

2-Methoxy-6-nitrobenzonitrile (Example 1290 (10.73 g, 60.2 mmol) and pyridine hydrochloride (16.0 g, 138 mmol) were mixed together as solids under nitrogen, and then heated in a preheated oil bath at 200° C. for 40 min. After cooling to room temperature, water (200 mL) and CH2Cl2 (200 mL) were added and stirred vigorously for 1 hour. Then, the precipitated product was collected by filtration and recrystallized from water, to give 8.2 g, (83%) of 2-hydroxy-6-nitrobenzonitrile as a brown solid. 1H-NMR (400 MHz, DMSO-d6) δ 12.13 (broad s, 1H), 7.68-7.79 (m, 2H), 7.39-7.44 (m, 1H).

1. temperatureAfter cooling to room temperature
2. filtrationThen, the precipitated product was collected by filtration
3. customrecrystallized from water