反应详情

温度

75 °C

To 2-(4-bromo-5-(pyridin-4-yl)-1H-pyrazol-1-yl)ethanol (0.050 g; Example 2, Step 2) dissolved in 5 mL acetonitrile was added 2 mL water, (E)-1-(benzyloxyimino)-2,3-dihydro-1H-inden-5-ylboronic acid (0.058 g; Example 2, Step 4), and 0.155 g potassium carbonate. The mixture was purged with nitrogen and about 20 mg tetrakis(triphenyphosphine)palladium(0) catalyst was added. The mixture was heated at 75° C. After 1 hour, the reaction mixture was filtered through celite, the filter cake washed with ethyl acetate, and the filtrate evaporated under vacuum. The residue was partitioned between ethyl acetate and water. The ethyl acetate was washed with saturated aqueous sodium carbonate, brine, dried over magnesium sulfate, filtered, and evaporated under vacuum to yield 0.05 g crude product as a colorless glass. The crude material was purified by chromatography, eluting with a mixture of 8:1 dichloromethane-methanol to afford 18.6 mg (23% yield) product as a colorless glass. 1H NMR (CDCl3) was consistent with the desired structure. LC/MS showed one peak with a M+1 molecular ion of m/z 425.2 by positive ESI.

1. customThe mixture was purged with nitrogen and about 20 mg tetrakis(triphenyphosphine)palladium(0) catalyst
2. additionwas added
3. filtrationthe reaction mixture was filtered through celite
4. washthe filter cake washed with ethyl acetate
5. customthe filtrate evaporated under vacuum
6. customThe residue was partitioned between ethyl acetate and water
7. washThe ethyl acetate was washed with saturated aqueous sodium carbonate, brine
8. dry with materialdried over magnesium sulfate
9. filtrationfiltered
10. customevaporated under vacuum
11. customto yield 0.05 g crude product as a colorless glass
12. customThe crude material was purified by chromatography
13. washeluting with a mixture of 8:1 dichloromethane-methanol