反应详情

To a stirred solution of (2S,5R)-1-(chloroacetyl)-5-ethynylpyrrolidine-2-carbonitrile (0.03 g, 0.152 mmol) in acetonitrile (1 mL) at room temperature was added exo-2-aminonorborane (0.036 mL, 0.305 mmol) and a catalytic amount of tetrabutylammonium iodide. The reaction mixture was stirred at room temperature for 18 hours, concentrated under reduced pressure and purified by flash chromatography with 3% methanol:dichloromethane to provide the titled compound. MS (CI) m/z 271 (M+1)+; 1H NMR (300 MHz, MeOH-d4): δ ppm 4.7-4.8 (m, 2H), 3.61-3.8 (m, 2H), 3.2-3.3 (m, 1H), 3.02-3.11 (1H, s), 2.62-2.72 (m, 1H), 2.37-2.44 (m, 3H), 2.2-2.3 (br s, 2H), 1.0-1.7 (m, 8H).

1. concentrationconcentrated under reduced pressure
2. custompurified by flash chromatography with 3% methanol