反应详情

温度

80 °C

tert-Butyl (2S,3R)-1-cyclohexyl-3-(methanesulfonyloxy)butan-2-ylcarbamate (0.46 g, 1.32 mmol) was dissolved into anhydrous DMF (10 mL), solid NaN3 (0.26 g, 4 mmol) was added and the reaction mixture was heated to 80° C. overnight. The reaction mixture was cooled to rt and diluted with EtOAc (100 mL) and water (30 mL). The organic phase was washed with water (3×30 mL), dried over Na2SO4 and evaporated. The residue was separated by chromatography on a silica gel column to give tert-butyl (2S,3S)-3-azido-1-cyclohexylbutan-2-ylcarbamate (0.215 g, 55%). 1H NMR (400 MHz, CDCl3): 4.38 (d, J=9.2 Hz, 1H), 3.72 (m, 1H), 3.60 (m, 1H), 1.82 (m, 1H), 1.67 (m, 4h), 1.44 (s, 9H), 1.40-1.00 (m, 61), 1.28 (d, J=6.4 Hz, 3H), 1.00-0.75 (m, 2H); MS (E/Z): 297 (M+H+).

1. additionwas added
2. temperatureThe reaction mixture was cooled to rt
3. washThe organic phase was washed with water (3×30 mL)
4. dry with materialdried over Na2SO4
5. customevaporated
6. customThe residue was separated by chromatography on a silica gel column