反应详情

To a flask containing LiHMDS (32 mL, 31.89 mmol, 1.0 M in THF) at −70° C., was slowly added 4-methylpyrimidine (1.0 g, 10.63 mmol). After 5 min of stirring at −70° C. diethylcarbonate (1.93 mL, 15.95 mmol) was added, the reaction was slowly warmed to room temperature and stirred for 4 days. The reaction mixture was quenched by addition of 1 N HCl, neutralized with saturated aqueous NaHCO3 and extracted with EtOAc (3×). The combined organics were dried over Na2SO4, filtered, concentrated under reduced pressure and purified by flash chromatography on silica gel (0-100% EtOAc in hexanes) to give the title compound as a yellow oil (1.38 g, 78%). MS 167 (MH+).

1. additionwas added
2. customThe reaction mixture was quenched by addition of 1 N HCl
3. extractionextracted with EtOAc (3×)
4. dry with materialThe combined organics were dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. custompurified by flash chromatography on silica gel (0-100% EtOAc in hexanes)