反应详情

A mixture of 2,7-dibromo-[1,2,4]triazolo[1,5-a]pyridine (1 g, 3.61 mmol) and morpholine (10.0 g, 10 ml, 115 mmol) was refluxed for 4 hours under argon atmosphere, the formerly green mixture turning to yellow. The reaction mixture is concentrated to dryness, applied on silica and purified by flash chromatography on a 20 g silica column using heptane/ethyl acetate 10-100% as eluent affording 4-(7-bromo-[1,2,4]triazolo[1,5-a]pyridin-2-yl)morpholine (367 mg, 35.9%) as a white solid. mp.: 178-9° C. MS: m/z=285.0, 283.0 (M+H+).

1. temperaturewas refluxed for 4 hours under argon atmosphere
2. concentrationThe reaction mixture is concentrated to dryness
3. custompurified by flash chromatography on a 20 g silica column