反应详情

温度

110 °C

A mixture of methyl 2-chloro-5-fluoronicotinate (step 1, 1.5 g, 7.91 mmol), tetrakis(triphenylphoshine)palladium (914 mg, 0.79 mmol), methyboronic acid (521 mg, 8.70 mmol) and potassium carbonate (3.28 g, 23.7 mmol) in 1,4-dioxane (20 ml) was heated at 110° C. for 20 h under nitrogen atmosphere. The reaction mixture was filtered through a pad of celite (Celite(trademark) (diatomaceous earth)) and the filtrate was concentrated. The residue was purified by flush column chromatography on silica gel eluting with hexane/ethyl acetate (20/1 to 4/1) to afford 936 mg (64%) of the title compound:

1. filtrationThe reaction mixture was filtered through a pad of celite (Celite(trademark) (diatomaceous earth))
2. concentrationthe filtrate was concentrated
3. customThe residue was purified
4. customby flush column chromatography on silica gel eluting with hexane/ethyl acetate (20/1 to 4/1)