反应详情

温度

80 °C

A mixture of copper(I) iodide (0.067 g, 0.35 mmol), Pd(dppf)Cl2 (0.14 g, 0.18 mmol), and 4,6-dichloropyrimidine (0.52 g, 3.50 mmol) in DMA (3 mL) was placed under argon atmosphere using 3 evacuation/backfill cycles. The zinc reagent prepared in Step 1a above (4.5 mL, about 4.5 mmol) was added dropwise via syringe and the mixture was heated to 80° C. for 4 h, then cooled to RT. Ethyl acetate and saturated aqueous ammonium chloride were added, the resulting layers were separated, and the organic layer was washed with water (2×), brine, dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo to give an oil. The oil was purified by silica gel chromatography to give 4-chloro-6-(tetrahydro-2H-pyran-4-yl)pyrimidine (0.13 g, 0.64 mmol, 14% yield) as a light yellow solid.

1. temperaturecooled to RT
2. customthe resulting layers were separated
3. washthe organic layer was washed with water (2×), brine
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customto give an oil
8. customThe oil was purified by silica gel chromatography