反应详情

温度

50 °C

To a solution of phenol (2.1 g, 22.4 mmol, 3 equiv) in DMF (10 ml) at room temperature were added NaH (60% dispersion in mineral oil, 360 mg, 9.0 mmol, 1.2 equiv) and after 10 min 2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)-2-methylpropyl methanesulfonate (D273) (2 g, 7.5 mmol, 1 equiv) and the resulting solution was stirred at 50° C. for 2 h then cooled to room temperature and concentrated in vacuo. Purification of the residue by flash chromatography on silica gel (iso-hexane/AcOEt: 9/1 to 6/1) gave 1,1-dimethylethyl [1,1-dimethyl-2-(phenyloxy)ethyl]carbamate (D274) (180 mg, 9%) as a yellow oil.

1. temperaturethen cooled to room temperature
2. concentrationconcentrated in vacuo
3. customPurification of the residue by flash chromatography on silica gel (iso-hexane/AcOEt: 9/1 to 6/1)