反应详情

温度

75 °C

To the solution of (R or S)-5-Hydroxycyclohex-1-enecarbonitrile (Intermediate #40, 2.0 g, 16 mmol) in N,N-dimethylformamide (10 mL) was added sodium hydride (850 mg, 21 mmol, 60% dispersion in oil) at 0° C. The resulting suspension was stirred at ambient temperature for 30 minutes before the addition of bromomethylcyclopropane (3.3 g, 24 mmol). The mixture was then stirred at 75° C. for 6 hours, and diluted with EtOAc (50 mL). The organic solution was washed with brine (2×10 mL), dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The crude residue was purified by MPLC on Silica gel (eluting with 2-5% EtOAc/hexane) to afford the title compound as a yellow oil. 1H NMR (300 MHz, CDCl3) δ 6.63-6.62 (m, 1H), 3.69-3.66 (m, 1H), 3.34-3.32 (m, 2H), 2.54-2.49 (m, 1H), 2.38-2.30 (m, 1H), 2.29-2.24 (m, 2H), 1.85-1.83 (m, 1H), 1.75-1.72 (m, 1H), 1.08-1.04 (m, 1H), 0.59-0.54 (m, 2H), 0.24-0.20 (1,2H).

1. washThe organic solution was washed with brine (2×10 mL)
2. dry with materialdried over anhydrous sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe crude residue was purified by MPLC on Silica gel (eluting with 2-5% EtOAc/hexane)