Reaction Steps
A flask was charged with 5-bromo-7-(bromomethyl)-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazole (0.61 g, 1.45 mmol), tert-butyl 4-(hydroxymethyl)-4-phenylpiperidine-1-carboxylate (0.444 g, 1.52 mmol), and dimethylformamide (5 mL). The reaction was cooled to 0° C. and treated with sodium hydride (0.073 g, 3.05 mmol) in several portions. After stirring for 15 min, the ice bath was removed and stirring continued for 15 min. The reaction was cooled to 0° C. and quenched by the cautious addition of saturated ammonium chloride. The reaction was poured into diethyl ether, washed with water (3×), then brine, dried over magnesium sulfate, and concentrated. Column chromatography (12%→25% EtOAc/Hex) gave 720 mg (79%) as a gum. 1H-NMR (CDCl3, 500 MHz) δ 8.00 (s, 1H), 7.70 (d, J=1.5 Hz, 1H), 7.38 (m, 4H), 7.24 (m, 1H), 7.13 (d, J=1.5 Hz, 1H), 5.65 (s, 2H), 4.81 (s, 2H), 3.76 (bs, 2H), 3.58 (t, J=8.2 Hz, 2H), 3.53 (s, 2H), 3.06 (m, 2H), 2.22 (m, 2H), 1.95 (m, 2H), 1.44 (s, 9H), 0.91 (t, J=8.2 Hz, 2H), 0.00 (s, 9H); 13C-NMR (CDCl3, 126 MHz) δ 155.1, 145.5, 142.9, 130.5, 128.6, 127.4, 126.6, 126.5, 123.3, 122.2, 121.3, 116.0, 81.9, 80.0, 79.4, 68.5, 67.6, 41.9, 40.3 (br), 32.0, 28.6, 17.9, −1.3. Mass spec.: 630.14 (MH)+.
