反应详情

To a degassed solution of 5-benzo[1,3]dioxol-5-yl-4-bromo-oxazole (50 mg, 0.19 mmol) and tetrakis(triphenylphosphine)palladium(0) (11 mg, 0.009 mmol, 0.05 equiv) in THF (2 mL) was added 2-zinc bromo -pyridine (1 mL, 0.5 M in THF, 0.500 mmol, 2.6 equiv). The resulting reaction mixture was heated to reflux overnight, cooled to ambient temperature, treated with saturated aqueous ammonium chloride, and diluted with ethyl acetate. The organic layer was washed with saturated aqueous ammonium chloride, dried over magnesium sulfate and concentrated in vacuo. Silica gel chromatography (50% ethyl acetate in hexane) provided 2-(5-Benzo[1,3]dioxol-5-yl-oxazol4-yl)-pyridine (22.7 mg, 46%). [LCMS: Rt=1.79 min, M+H=267.1]

1. customThe resulting reaction mixture
2. temperaturewas heated
3. temperatureto reflux overnight
4. washThe organic layer was washed with saturated aqueous ammonium chloride
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated in vacuo