反应详情

温度

100 °C

To a stirred solution of 4-((1,3-dioxoisoindolin-2-yl)methyl)-1-naphthaldehyde (9 g, 28.5 mmol) in 1,4-dioxane (100 mL) were added K2CO3 (6 g, 42.8 mmol) and methyl triphenyl phosphonium bromide (15.3 g, 35.7 mmol) at ambient temperature. The reaction mixture was heated at 100° C. for 14 h and then was cooled to ambient temperature. The reaction mixture was filtered, and the obtained filtrate was concentrated under reduced pressure. Purification by flash chromatography (SiO2, 100-200 mesh; 20% EtOAc in petroleum ether) afforded the title compound as a white solid (6 g, 67%): mp 146-147° C.; 1H NMR (400 MHz, CDCl3) δ 8.35 (m, 2H), 7.95 (m, 4H), 7.65 (m, 4H), 7.39 (m, 1H), 5.81 (m, 1H), 5.45 (m, 1H), 5.21 (s, 2H); ESIMS m/z 314.13 ([M+H]+).

1. temperaturewas cooled to ambient temperature
2. filtrationThe reaction mixture was filtered
3. concentrationthe obtained filtrate was concentrated under reduced pressure
4. customPurification by flash chromatography (SiO2, 100-200 mesh; 20% EtOAc in petroleum ether)