反应详情

温度

80 °C

A 0.76 g portion of imidazole was added to 7 ml of N,N-dimethylformamide and mixed with 0.2 g of 90% lithium hydride under ice-cooling and then the mixture was stirred for 40 minutes. Next, 2.17 g of 2-bromopyridine N-oxide hydrochloride was gradually added thereto, the mixture was stirred at room temperature for about 1 hour and further heated at 80° C. for about 1 hour, and then the solvent was evaporated and the thus obtained mixture was subjected to a silica gel column chromatography and eluted with chloroform-methanol-28% aqueous ammonia (10:0.9:0.1, v/v/v) to obtain 1.21 g of the title compound as light yellow crystals.

1. temperaturecooling
2. stirringthe mixture was stirred at room temperature for about 1 hour
3. customthe solvent was evaporated
4. washeluted with chloroform-methanol-28% aqueous ammonia (10:0.9:0.1, v/v/v)