反应详情

温度

0 °C

3-Bromo4-methyldibenzofuran (26.11 g, 0.1 mol) suspended in dry ether (700 ml) was cooled to 0° C. and n-butyl lithium (1.6M in hexane, 62.5 ml, 0.1 mol) was added and the reaction stirred for 5 mins. DMF (5 ml) in ether (12 ml) was added and the reaction heated to reflux for 1 hour. The mixture was poured onto a mixture of conc. HCl (25 ml) and ice (1 l). The organic phase was separated and the aqueous extreacted with ether. The combined organic phases were dried (MgSO4) and evaporated in vacuo. The resulting solid was crystallised from IMS to give off-white needles which were dried at 60° C. under vacuum (4.68 g, 22%). Further product could be obtained from the mother liquor. (Found: C, 78.97; H, 4.56. C14H10O2 0.15H2O requires: C, 78.97; H, 4.88%); δH [2H6 ]-DMSO 10.4 (1H, s, CHO), (8.2 (1H, d), 8.15 (1H, d), 7.9 (1H, d), 7.8 (1H, d), 7.65 (1H, t), 7.45 (1H, t), 2.85 (3H, s); m/z 210 (M+); νmax (KBr disc)/cm-1 1686.

1. temperaturethe reaction heated
2. temperatureto reflux for 1 hour
3. customThe organic phase was separated
4. dry with materialThe combined organic phases were dried (MgSO4)
5. customevaporated in vacuo
6. customThe resulting solid was crystallised from IMS
7. customto give off-white needles which
8. customwere dried at 60° C. under vacuum (4.68 g, 22%)
9. customFurther product could be obtained from the mother liquor