反应详情

2-(4-fluorophenyl)cyclohexanone and carbonisocyanatidic chloride (0.966 mL, 12 mmol) was reacted as in Intermediate AC(1) to provide 8-(4-fluorophenyl)-5,6,7,8-tetrahydro-2H-benzo[e][1,3]oxazine-2,4(3H)-dione (415.0 mg, 1.689 mmol, 19.62% yield) as white solid and 4a-(4-fluorophenyl)-4a,5,6,7-tetrahydro-2H-benzo[e][1,3]oxazine-2,4(3H)-dione (746.4 mg, 3.04 mmol, 35.3% yield) as white solid. 8-(4-fluorophenyl)-5,6,7,8-tetrahydro-2H-benzo[e][1,3]oxazine-2,4(3H)-dione. LC-MS (M+H)+=262.1. 1H NMR (500 MHz, CDCl3) δ ppm 9.61 (1H, br s), 7.10 (2H, dd, J=5.0, 8.5 Hz), 6.98 (2H, app t, J=8.5 Hz), 3.77 (1H, t, J=4.9 Hz), 2.38-2.53 (2H, m), 2.16-2.07 (1H, m), 1.87-1.62 (3H, m).