反应详情

温度

80 °C

To a mixture of 5-bromo-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (17.0 g, 60.7 mmol; Intermediate 1), Pd(PPh3)2Cl2 (5.80 g, 6.07 mmol), CuI (1.20 g, 6.07 mmol), and triethylamine (170 mL) was added but-3-yn-1-ol (6.80 g, 97.2 mmol) under N2 atmosphere. The resulting mixture was stirred at 80° C. for 16 hours under N2 atmosphere. Upon completion, the reaction mixture was diluted with EtOAc and washed with water (3×50 mL). The organic layer was dried over Na2SO4 and concentrated in vacuo. The residue was purified by column chromatography on silica gel (30˜50% EtOAc in petroleum ether) affording the title compound (8.0 g). 1H NMR (400 MHz, DMSO-d6): δ 8.09 (s, 1H), 7.83 (s, 1H), 7.70 (d, 1H), 7.40 (d, 1H), 5.84 (dd, 1H), 4.90 (br, 1H), 3.91-3.87 (m, 1H), 3.77-3.70 (m, 1H), 3.60 (t, 2H), 2.56 (t, 2H), 2.48-2.33 (m, 1H), 2.04-1.94 (m, 2H), 1.76-1.69 (m, 1H), 1.60-1.55 (m, 2H); LCMS: 271 (M+H)+.

1. washwashed with water (3×50 mL)
2. dry with materialThe organic layer was dried over Na2SO4
3. concentrationconcentrated in vacuo
4. customThe residue was purified by column chromatography on silica gel (30˜50% EtOAc in petroleum ether)