反应详情

温度

50 °C

To a 100 mL round bottomed flask with a stirring bar and a reflux condenser topped with an argon inlet was added ethyl 2-(4-bromomethylphenoxy)acetate 35-5 (2.73 g, 10 mmol), triphenylphosphine (2.62 g, 10 mmol) and dry benzene (50 mL). This solution was warmed to 50° C. for 20 h. The mixture was cooled to room temperature and the product was collected by filtration. The white solid was washed with a little benzene and dried in vacuo to give 4-(ethoxycarbonylmethoxy)benzyltriphenyl-phosphonium bromide 35-6 as a white, crystalline solid (4.79 g, 89%). 1H NMR (CDCl3): δ 1.28 (t, J=7 Hz, 3H), 4.27 (q, J=7 Hz, 2H), 4.53 (s, 2H), 5.38 (d, J=14 Hz, 2H), 6.66 (d, J=9 Hz, 2H), 7.06 (d, J=9 Hz, 2H), 7.62 (m, 6H), 7.76 (m, 9H).

1. customTo a 100 mL round bottomed flask with a stirring bar and a reflux condenser topped with an argon inlet
2. temperatureThe mixture was cooled to room temperature
3. filtrationthe product was collected by filtration
4. washThe white solid was washed with a little benzene
5. customdried in vacuo