反应详情

To a solution of isoindoline (576 mg, 4.0 mmol) in dry 1,4-dioxane (20 mL) was added 4-methoxy-2-methylphenyl isocyanate (815 mg, 5.0 mmol) under argon at room temperature. The reaction mixture was then stirred at RT overnight. The solvent was evaporated under reduced pressure, and the residue was purified by chromatography on silica gel (EtOAc/hexanes: 1:1) to give the title compound (1.18 g, 84%) as a white solid. 1H NMR (500 MHz, DMSO-d6): δ 2.19 (s, 3H), 3.72 (s, 3H), 4.73 (s, 4H), 6.72 (dd, J=2.5 Hz, 8.5 Hz, 1H), 6.78 (d, J=2.5 Hz, 1H), 7.17 (d, J=8.5 Hz, 1H), 7.30-7.32 (m, 2H), 7.34-7.36 (m, 2H), 7.74 (s, 1H), 13C NMR (DMSO-d6): δ 18.2, 51.9, 55.1, 110.9, 115.1, 122.8, 127.2, 127.8, 130.6, 135.1, 137.0, 154.9, 156.5; MS (MH+, 283); EA calc'd for C17H18N2O2: C, 72.32; H, 6.43; N, 9.92. Found C, 72.16; H, 6.82; N, 9.98.

1. customThe solvent was evaporated under reduced pressure
2. customthe residue was purified by chromatography on silica gel (EtOAc/hexanes: 1:1)