反应详情

The compound (S)-7-Fluoro-4-(3-hydroxy-2-methylpropyl)-4H-benzo[1,4]oxazin-3-one (111MF18) (2.57 g, 11.0 mmol), triphenylphosphine (6.61 g, 23.7 mmol), imidazole (1.76 g, 25.8 mmol) and I2 (7.64 g, 30.1 mmol) were mixed according to GP9. CC (SiO2; Heptane/EtOAc 9:1-4) gave the title compound (111MF20) (3.31 g, 89%). 1H NMR (CDCl3) δ 7.00-6.96 (m, 1H), 6.78-6.74 (m, 2H), 4.65-4.56 (m, 2H), 3.92 (d, J=7.6 Hz, 2H), 3.21-3.13 (m, 2H), 2.13-2.03 (m, 1H), 1.04 (d, J=6.4 Hz, 3H); 13C NMR (CDCl3) δ 164.3, 159.0 (d, J=244.4 Hz), 146.6 (d, J=12.0 Hz), 125.0 (d, J=3.0 Hz), 115.9 (d, J=9.7 Hz), 109.4 (d, J=22.5 Hz), 105.5 (d, J=26.0 Hz), 67.8, 46.3, 33.6, 18.9, 11.8.