反应详情

温度

80 °C

A Schlenck flask was charged with palladium acetate (0.0966 g, 0.430 mmol), triphenylphosphine (0.4513 g, 1.721 mmol), and 1,4-dioxane (6 mL) and the mixture was stirred for 5 min until it turned bright yellow. 8-Bromo-2-chloro-[1,2,4]triazolo[1,5-a]pyridine (0.500 g, 2.15 mmol), 2-methoxybenzeneboronic acid (0.490 g, 3.23 mmol), N,N-dimethylformamide (10.00 mL), and 1.00 N sodium carbonate in water (4.3 mL, 4.3 mmol) were added successively and the reaction was heated at 80° C. overnight, cooled to room temperature, diluted with dichloromethane, filtered through diatomaceous earth and concentrated. The reaction was purified via chromatography (silica gel 10%→20% ethyl acetate in hexanes) and concentrated to give 2-chloro-8-(2-methoxy-phenyl)-[1,2,4]triazolo[1,5-a]pyridine (0.464 g, 83%). MS=260 (MH)+.

1. temperaturecooled to room temperature
2. filtrationfiltered through diatomaceous earth
3. concentrationconcentrated
4. customThe reaction was purified via chromatography (silica gel 10%→20% ethyl acetate in hexanes)
5. concentrationconcentrated