反应详情

Using the procedure described in Example 306A, to a solution of 3-tert-butyl-1-(6-methylpyridin-3-yl)-1H-pyrazol-5-amine (95 mg, 0.41 mmol) and potassium carbonate (75 mg, 0.54 mmol) in anhydrous DCM (1.5 ml) was added dropwise phenyl chloroformate (0.16 ml, 1.24 mmol) as a solution in DCM (1 ml). The crude was purified by silica gel chromatography (DCM/EtOAc 7-60%) to afford phenyl 3-tert-butyl-1-(6-methylpyridin-3-yl)-1H-pyrazol-5-ylcarbamate (61 mg, 42%). 1H NMR (300 MHz, CDCl3) δ 1.34 (s, 9H), 2.63 (s, 3H), 6.47 (s, 1H), 6.83 (d, J=8 Hz, 1H), 6.91-6.93 (m, 3H), 7.12 (s, 1H), 7.21-7.40 (m, 2H), 7.78 (d, J=8 Hz, 1H), 8.68 (d, J=2 Hz, 1H); LC-MS (ESI) m/z 351 (M+H)+.

1. customThe crude was purified by silica gel chromatography (DCM/EtOAc 7-60%)