反应详情

温度

65 °C

A solution of methanesulfonic acid trans-4-tert-butoxycarbonylamino-cyclohexyl ester (21 g, 72 mmol) in DMSO (350 mL) was charged with sodium azide (14 g, 216 mmol) and heated at 65° C. for 14 h. After cooling to RT, the solution was diluted with EtOAc and washed successively with water, 5% aq. NaHCO3, water, and brine. The solution was dried (Na2SO4), filtered, and concentrated in vacuo, and the resulting residue was purified via flash chromatography to afford (cis-4-azido-cyclohexyl)-carbamic acid tert-butyl ester (16 g, 92% yield). MS found: (M+H)+=241.7.

1. temperatureAfter cooling to RT
2. washwashed successively with water, 5% aq. NaHCO3, water, and brine
3. dry with materialThe solution was dried (Na2SO4)
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customthe resulting residue was purified via flash chromatography