反应详情

Compound 2a (3 g, 1 eq.), carbonyldiimidazole (2.04 g, 1.2 eq.), and triethylamine (1.74 g, 1.2 eq.) in anhydrous DMF (60 mL) were stirred at room temperature for 2 days. The reaction mixture was then washed with water. Organics were dried over Na2SO4, filtered, and concentrated under reduced pressure to yield compound 3a as a pale yellow oil in 94% yield. 1H NMR (CDCl3, 400 MHz) δ (ppm) 1.33 (quint, J=8.04 Hz, 2H), 1.61 (quint, J=8.04 Hz, 2H), 2.02 (q, J=7.46 Hz, 2H), 3.00 (s, 3H), 3.05 (t, J=7.46 Hz, 2H), 3.35 (t, J=7.46 Hz, 1H), 4.89-4.96 (m, 2H), 7.02 (m, 1H), 7.15 (m, 1H), 7.81 (s, 1H).

1. washThe reaction mixture was then washed with water
2. dry with materialOrganics were dried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure