反应详情

To a mixture of ethyl 2-(4-(6-(trifluoromethyl)-1H-indazol-4-yl)-1H-pyrazol-1-yl)acetate (0.14 g, 0.414 mmol) and THF—H2O (5:1, 4 mL) was added lithium hydroxide (0.621 mL, 1.242 mmol) at room temperature. The reaction mixture was stirred for 1 hour, then acidified with concentrated HCl, and concentrated in vacuo to give an HCl salt of the title compound as a light brown solid (0.12 g, 93%). 1H NMR (400 MHz, DMSO-d6) δ ppm 4.97 (s, 2H), 7.58 (s, 1H), 7.76 (s, 1H), 8.22 (s, 1H), 8.54 (s, 1H), 8.59 (s, 1H), 13.70 (br s, 1H); ESI-MS m/z [M+H]+ calc'd for C13H9F3N4O2, 311.1. found 311.15.

1. concentrationconcentrated in vacuo