反应详情

Imidazole (860 mg, 12.63 mmol) was added to a solution of 2-chloro-3-nitro-thiophene (1 g, 6.10 mmol) in abs. ethanol (20 mL). The reaction mixture was heated to reflux in a sealed tube for 3 days and then concentrated under reduced pressure. Purification by flash chromatography (silica, 25:75 ethyl/hexane) gave 1-(3-nitrothiophen-2-yl)-1H-imidazole (540 mg, 45%). See Erker, T. J. et al., J. Heterocylic. Chem. 39 (2002) 857-861. Method [3] m/z 195.9 (M+H); retention time=0.615.

1. temperatureThe reaction mixture was heated
2. temperatureto reflux in a sealed tube for 3 days
3. concentrationconcentrated under reduced pressure
4. customPurification by flash chromatography (silica, 25:75 ethyl/hexane)