反应详情

温度

-78 °C

To a solution of 5-methyl-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazole (as prepared in the previous step, 0.320 g, 1.50 mmol) in 5 mL of THF at −78° C. was added n-BuLi (0.80 mL, 2 M in cyclohexane) and the mixture was allowed to attain RT and stirred for 30 min. The mixture was cooled to −78° C. and ethyl cyanoformate (0.160 g, 1.65 mmol) was added and the mixture allowed to stir for 10 h at RT. The reaction was diluted with 15 mL of EtOAc and washed with NaHCO3 (2×15 mL) and brine (15 mL). The title compound was eluted from a 20-g SPE with 50% EtOAc/hexanes to give 0.160 g (38%) of a light brown oil: Mass spectrum (ESI, m/z): Calcd. for C13H24N2O3Si, 285.2 (M+H), found 284.9.

1. customto attain RT
2. stirringto stir for 10 h at RT
3. washwashed with NaHCO3 (2×15 mL) and brine (15 mL)
4. washThe title compound was eluted from a 20-g SPE with 50% EtOAc/hexanes