反应详情

温度

55 °C

To a solution of Example 220A (365 mg, 1.021 mmol) in N,N-dimethylformamide (5 mL) was added sodium azide (531 mg, 8.17 mmol). The reaction mixture was stirred at 55° C. for 8 hours. Chromatography on a 12 g silica gel column eluted with 5% ethyl acetate/hexanes for 3 minutes followed by a gradient to 100% ethyl acetate over 20 minutes provided the title compound (135 mg, 0.557 mmol, 54.6% yield) as an oil. 1H NMR (400 MHz, DMSO-d6) δ ppm 4.65 (d, J=3.5 Hz, 1H), 4.24 (d, J=3.5 Hz, 1H), 3.97 (ddd, J=10.2, 7.6, 3.1 Hz, 1H), 3.64 (dd, J=12.3, 5.5 Hz, 1H), 3.39-3.22 (m, 3H), 2.01-1.80 (m, 2H), 1.42 (s, 9H); MS (DCI) m/z 243 (M+H)+.

1. washChromatography on a 12 g silica gel column eluted with 5% ethyl acetate/hexanes for 3 minutes
2. waitfollowed by a gradient to 100% ethyl acetate over 20 minutes