反应详情

To a solution of the title compound from Example 1 Step B (251 mg, 0.67 mmol), the title compound from Example 10 Step C (248 mg, 1.00 mmol), and triphenylphosphine (349 mg, 1.33 mmol) in DCM (3 mL) was added diisopropyl azodicarboxylate (0.259 mL, 1.33 mmol). The resulting mixture was stirred at ambient temperature. After 5 h, the reaction mixture was concentrated in vacuo. Purification by flash chromatography on silica gel (0 to 25% EtOAc in hexanes then 25 to 100% EtOAc in hexanes) provided the title compound: LCMS m/z 608.06 [M+H]+; 1H NMR (500 MHz, CDCl3) δ 8.15 (d, J=8.0 Hz, 1H), 8.12 (s, 1H), 7.97 (d, J=8.0 Hz, 1H), 7.85 (t, J=8.0 Hz, 1H), 7.52 (d, J=7.5 Hz, 1H), 7.38-7.35 (m, 1H), 7.29 (d, J=7.5 Hz, 2H), 7.23 (d, J=7.5 Hz, 2H), 7.12-7.06 (m, 2H), 5.12 (s, 2H), 4.38 (q, J=7.0 Hz, 2H), 3.98 (s, 4H), 2.60-2.54 (m, 1H), 1.87-1.65 (m, 8H), 1.39 (t, J=7.0 Hz, 3H).

1. concentrationthe reaction mixture was concentrated in vacuo
2. customPurification by flash chromatography on silica gel (0 to 25% EtOAc in hexanes