In a 500 mL four-neck flask, THF (120 mL), methanol (3.66 g, 115 mmol, 0.95 equiv) and 2,6-dichloro-3-nitropyridine (23 g, 120 mmol, 1 equiv) were added sequentially. After cooling the reaction system to 0 °C, 60% sodium hydride (6.8 g, 170 mmol, 1.7 equiv) was slowly added. The reaction was kept at 0 °C and stirred for 30 min, then brought to room temperature and continued stirring for 2 h. The reaction was then stopped at 0 °C. Upon completion of the reaction, the reaction was quenched with deionized water (100 mL) and extracted with ethyl acetate (3 x 150 mL). The organic phases were combined, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The crude product was purified by silica gel column chromatography to afford the target compound 2-chloro-6-methoxy-3-nitropyridine (12 g, 56% yield).1H NMR (300 MHz, CDCl3) δ: 8.37-8.24 (m, 1H), 7.07-7.05 (m, 1H), 4.15 (s, 3H).
