反应详情

The title compound of step 5 (325 mg, 0.76 mmol), the title compound of Example 41, step 2 (201 mg, 0.64 mmol), Pd(dppf)Cl2 (66 mg, 0.08 mmol) and AcOK (125 mg, 1.28 mmol) in 1,4-dioxane (6 mL) were heated at 70° C. for 12 h. After silica gel column chromatography (PE:EA=5:1-0:1) the title compound (80 mg, 23.6%) was obtained as a gray solid. 1H NMR: (CDCl3, 400 MHz) δ 8.48 (d, J=8.4 Hz, 1H), 8.03 (dd, J1=8.8 Hz, J2=2.4 Hz, 1H), 7.88 (d, J=2.4 Hz, 1H), 7.58-7.69 (m, 2H), 7.14-7.18 (m, 2H), 7.06 (s, 1H), 4.50 (t, J=4.4 Hz, 2H), 4.06-4.15 (m, 1H), 3.93 (s, 3H), 3.84-3.90 (m, 1H), 3.84 (s, 3H), 3.71-3.80 (m, 2H), 3.65 (s, 3H), 3.49 (t, J=5.6 Hz, 2H), 3.41-3.47 (m, 1H), 1.25-1.67 (m, 6H). LCMS: 538.2 (M+H)+; 454.1 (M+H-THP)+.