反应详情

温度

120 °C

A 10-mL microwave vial was charged with 4-chloro-2-(3-chlorophenyl)-6-(trifluoromethyl)pyridine (0.150 g, 0.51 mmol), 4-aminophenyl acetic acid ethyl ester (0.138 g, 0.77 mmol), palladium acetate (0.006 g, 0.026 mmol), rac-BINAP (0.024 g, 0.038 mmol) and cesium carbonate (0.418 g, 1.28 mmol) in dioxane (5 mL) under argon. The reaction mixture was heated to 120° C. under microwave irradiation for 2 h. After this time, the reaction mixture was cooled and absorbed onto silica (4 g). Purification by chromatography on silica using hexanes/ethyl acetate (10:0 to 0:10) as eluent followed by preparative HPLC (water/acetonitrile with 0.05% TFA) afforded the title compound (0.064 g, 28%) as a tacky solid. MW=434.84. 1H NMR (CDCl3, 300 MHz) δ 9.39 (s, 1H), 8.00-7.97 (m, 1H), 7.93-7.86 (m, 1H), 7.57-7.52 (m, 3H), 7.35-7.25 (m, 4H), 7.21 (d, J=3.0 Hz, 1H), 4.09 (q, J=7.2 Hz, 2H), 3.67 (s, 3H), 1.20 (t, J=7.2 Hz, 3H); ESI MS m/z 435 [M+H]+.

1. temperatureAfter this time, the reaction mixture was cooled
2. customabsorbed onto silica (4 g)
3. customPurification by chromatography on silica