反应详情

温度

60 °C

To a mixture of 5-bromo-4-fluoro-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (2.80 g, 9.36 mmol, Intermediate 18), Pd(PPh3)2Cl2 (660 mg, 0.94 mmol), CuI (180 mg, 0.94 mmol), and triethylamine (50 mL) was added but-3-yn-1-ol (2.0 g, 28.1 mmol) under N2 atmosphere. The resulting mixture was stirred at 60° C. for 16 hours. Upon completion, the reaction mixture was diluted with EtOAc, and washed with water (3×10 mL). The organic layer was dried over Na2SO4 and concentrated in vacuo. The residue was purified on silica gel column (0˜20% EtOAc in petroleum ether) affording the title compound (2.0 g). 1H NMR (300 MHz, DMSO-d6): δ 8.33 (s, 1H), 7.64 (d, 1H), 7.49 (dd, 1H), 5.94 (dd, 1H), 4.99 (t, 1H), 3.98-3.92 (m, 1H), 3.85-3.77 (m, 1H), 3.68 (t, 2H), 2.67 (t, 2H), 2.48-2.35 (m, 1H), 2.12-2.02 (m, 2H), 1.84-1.78 (m, 1H), 1.68-1.62 (m, 2H).

1. washwashed with water (3×10 mL)
2. dry with materialThe organic layer was dried over Na2SO4
3. concentrationconcentrated in vacuo
4. customThe residue was purified on silica gel column (0˜20% EtOAc in petroleum ether)