反应详情

To a mixture of phthalimide (1.0 g, 6.8 mmol), Ph3P (1.9 g, 7.2 mmol), 2-(2-hydroxyethyl)-6-phenylpyridazin-3(2H)-one (1.2 g, 5.5 mmol) in THF (20 mL) was added diisopropyl azodicarboxylate (1.4 mL, 7.2 mmol) dropwise. The resulting hot, clear solution was stirred at room temperature. After 3 h, hexane (40 mL) was added. The slurry was filtered and the solid was washed with ether (6×15 mL) to give the product as a white (2.1 g). MS (ESI pos. ion) calc'd for C20H15N3O3: 345.1; found: 346.4 (MH+). 1H NMR (400 MHz, DMSO-d6) δ ppm 4.03 (dd, 2 H) 4.39 (t, 2 H) 6.99 (d, J=9.78 Hz, 1 H) 7.26 (t, J=7.43 Hz, 2 H) 7.34 (t, J=7.34 Hz, 1 H) 7.50 (d, J=7.24 Hz, 2 H) 7.72-7.82 (m, 4 H) 7.97 (d, J=9.78 Hz, 1 H)

1. filtrationThe slurry was filtered
2. washthe solid was washed with ether (6×15 mL)
3. customto give the product as a white (2.1 g)