反应详情

温度

90 °C

A mixture of {trans-4-[(tert-butoxycarbonyl)amino]cyclohexyl}methyl methanesulfonate (1.48 g, 4.81 mmol) and sodium cyanide (0.46 g, 9.4 mmol) in dimethyl sulfoxide (20 mL) was stirred at 90° C. for 4 h. After cooling, the mixture was partitioned between EtOAc and brine. The organic layer was washed with water, concentrated and purified on silica gel (eluting with 50% EtOAc in hexanes) to give tert-butyl [trans-4-(cyanomethyl)cyclohexyl]carbamate. LCMS calculated for C13H22N2O2Na (M+Na)+: m/z=261.2. Found: 261.1. A solution of the Boc-protected intermediate in methylene chloride (20 mL) was treated with trifluoroacetic acid (3 mL, 40 mmol) and the resulting mixture was stirred at room temperature for 2 h, then concentrated to give the desired product as TFA salt. LCMS calculated for C8H15N2 (M+H)+: m/z=139.1. Found: 139.1.

1. temperatureAfter cooling
2. customthe mixture was partitioned between EtOAc and brine
3. washThe organic layer was washed with water
4. concentrationconcentrated
5. custompurified on silica gel (eluting with 50% EtOAc in hexanes)