反应详情

温度

0 °C

To a suspension of methyl triphenylphosphonium bromide (1.9 g, 5 mmol) in THF (25 mL) at −78° C. is added dropwise KHMDS (5 mmol, 11 mL of 0.5M solution). The mixture is stirred at 0° C. for 30 min then is recooled to −78° C. To this is added dropwise a solution of (1,1-dimethyl-2-oxo-ethyl)-carbamic acid tert-butyl ester (1.0 g, 5 mmol) in THF (5 mL). The mixture is stirred at −78° C. for 10 min then is allowed to warm to RT overnight. Water is added and the mixture is extracted with EtOAc. The organic phase is dried over magnesium sulfate and the solvent removed under reduced pressure. The resulting oil is purified by flash chromatography to give the title compound.

1. customthen is recooled to −78° C
2. stirringThe mixture is stirred at −78° C. for 10 min
3. temperatureto warm to RT overnight
4. extractionthe mixture is extracted with EtOAc
5. dry with materialThe organic phase is dried over magnesium sulfate
6. customthe solvent removed under reduced pressure
7. customThe resulting oil is purified by flash chromatography