反应详情

温度

60 °C

To a solution of 12-(2-bromo-ethoxy)-2,10-dichloro-12H-5,7-dioxa-dibenzo[a,d]cyclooctene (404 mg, 1.0 mmol) and 2-ethoxy-3-(4-hydroxy-phenyl)-propionic acid ethyl ester (238 mg, 1.0 mmol) in dry toluene (6 mL) was added- potassium carbonate (276 mg, 2.0 mmol) and 18-crown-6 (528 mg, 2.0 mmol). The mixture was heated at 60° C. for 16 h. The mixture was filtered, and concentrated in vacuo. The residue was submitted to flash chromatography using toluene/ethyl acetate (19:1) as eluent to give 297 mg (53%) of the title compound; 1H NMR (300 MHz, CDCl3) δ1.18 (t, 3H), 1.25 (t, 3H), 2.96 (d, 2H), 3.30-3.42 (m, 1H), 3.55-3.65 (m, 1H), 3.90-3.95 (m, 2H), 4.0 (t, 1H), 4.15-425 (m, 4H), 4.55 (d, 1H), 5.87 (d, 1H), 6.18 (s, 1H), 6.88-6.95 (m, 4H), 7.10-7.25 (m, 4H), 7.60 (d, 2H).

1. filtrationThe mixture was filtered
2. concentrationconcentrated in vacuo