反应详情

温度

-78 °C

To a solution of n-butyllithium (2.5M in hexane, 1.03 mL, 2.57 mmol) in THF (3 mL) at −78° C. was added dropwise ethynyl(trimethyl)silane (0.34 mL, 2.38 mmol). The reaction was stirred at −78° C. for 10 minutes and then 1-(1,3-oxazol-4-yl)ethanone (220 mg, 1.98 mmol) was added in more THF (2 mL). The reaction was stirred at −78° C. to RT for 1 hr. The mixture was then diluted with water and the volatiles removed. The product was then extracted with EtOAc (2×15 mL) and the combined organics washed with water (2×5 mL) and dried (Na2SO4), filtered and concentrated in vacuo. The crude material was purified by column chromatography (eluted with 2-13% methanol) to give the title compound; 1H NMR (500 MHz, CDCl3) delta 1.85 (3H, s), 2.61 (1H, s), 2.92 (1H, s), 7.71 (1H, s), 7.87 (1H, s).

1. stirringThe reaction was stirred at −78° C. to RT for 1 hr
2. customthe volatiles removed
3. extractionThe product was then extracted with EtOAc (2×15 mL)
4. washthe combined organics washed with water (2×5 mL)
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customThe crude material was purified by column chromatography (eluted with 2-13% methanol)