反应详情

温度

80 °C

A mixture of 4-chloro-1H-imidazole (2.72 g, 26.5 mmol), 2-chloro-3-methoxy-5-nitropyridine (5.0 g, 26.5 mmol), and KOH flakes 1.488 g, 26.5 mmol) in anhydrous DMSO (25 mL) was heated at 80° C. for 5 h. The reaction mixture was allowed to cool to rt and was poured into 1.0 L of water with vigorous stirring. The mixture was stirred at rt for 16 h. The precipitate was collected by vacuum filtration using a coarse sintered glass funnel The solid was dried under high vacuum for 24 h to provide 2-(4-chloro-1H-imidazol-1-yl)-3-methoxy-5-nitropyridine (5.22 g, 20.50 mmol, 77% yield) as a light brown solid. LC-MS (M+H)+=255.0. 1H NMR (500 MHz, DMSO-d6) δ ppm 8.94 (d, J=2.44 Hz, 1H) 8.51 (d, J=1.83 Hz, 1H) 8.42 (d, J=2.44 Hz, 1H) 8.02 (d, J=1.83 Hz, 1H) 4.12 (s, 3H).

1. temperatureto cool to rt
2. filtrationThe precipitate was collected by vacuum filtration
3. customwas dried under high vacuum for 24 h