Cesium carbonate → Ethyl 1-(6-{2-[(4-iodobenzyl)oxy]phenyl}pyridin-2-yl)-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate

関与物質

反応手順

To a solution of the title compound from Example 1 Step B (304 mg, 0.81 mmol) in DMF (2.7 mL) were added 4-iodobenzyl bromide (359 mg, 1.21 mmol) and cesium carbonate (788 mg, 2.42 mmol). After 12 h, the reaction mixture was poured into sat. aq. NH4Cl and extracted with EtOAc. The organic phase was separated, dried over sodium sulfate, filtered, and concentrated in vacuo. Purification by flash chromatography on silica gel (0 to 25% EtOAc in hexanes, then 25 to 100% EtOAc in hexanes) provided the title compound: LCMS m/z 594.4 [M+H]+; 1H NMR (500 MHz, CDCl3) δ 8.13 (s, 1H), 8.08 (d, J=8.0 Hz, 1H), 7.94 (dd, J=7.5, 1.5 Hz, 1H), 7.88 (t, J=8.0 Hz, 1H), 7.68 (d, J=8.0 Hz, 2H), 7.54 (d, J=8.0 Hz, 1H), 739-7.35 (m, 1H), 7.14-7.12 (m, 1H), 7.11 (d, J=8.0 Hz, 2H), 7.02 (d, J=8.0 Hz, 1H), 5.09 (s, 2H), 4.39 (q, J=7.0 Hz, 2H), 1.39 (t, J=7.0 Hz, 3H).

情報源と証拠