反应详情

To a solution of 6-chloro-5-(4-ethoxyphenyl)-1H-indole (500.0 mg, 1.84 mmol) in anhydrous THF (5 mL) was added pyridine (436.0 mg, 5.52 mmol) and trichloroacetyl chloride (10 mL) at 0° C. under N2. The reaction mixture was stirred at room temperature under N2 for 12 hours. The mixture was poured into 0.5 N HCl (200 mL) and extracted with EtOAc (3×100 mL). The combined organic layers were washed with brine (100 mL), dried over Na2SO4 and concentrated in vacuo. The crude material was purified by flash chromatography (9-25% EtOAc/petroleum ether:EtOAc) to give the title compound (70.0 mg, 9%) as a green solid. 1H NMR (400 MHz, CDCl3) δ 8.80 (br, 1 H), 8.40 (s, 1 H), 8.36 (d, J=3.2 Hz, 1 H), 7.59 (s, 1 H), 7.42 (d, 2H), 6.97 (d, 2 H), 4.12 (q, J=7.00 Hz, 2 H), 1.45 (t, J=7.00 Hz, 3 H).

1. extractionextracted with EtOAc (3×100 mL)
2. washThe combined organic layers were washed with brine (100 mL)
3. dry with materialdried over Na2SO4
4. concentrationconcentrated in vacuo
5. customThe crude material was purified by flash chromatography (9-25% EtOAc/petroleum ether:EtOAc)