反应详情

温度

-10 °C

To a -30° C. solution of 2-(4-fluorophenylmethyl)furan, prepared as in step 1 (32.0 g, 0.18 mol) in anhydrous DMF (60 mL) was added a solution of bromine (28.9 g, 0.18 mol) in CH2Cl2 (250 mL). The mixture was stirred for 0.5 hours at -10° C. and poured into pentane (1600 mL). The penlane was then decanted from the dark colored insoluble layer. Evaporation of the pentane gave the crude product which was purified by flash-chromatography on silica gel eluting with penlane to provide 2-Bromo-5-(4-fluorophenylmethyl)furan as a cream colored solid in a yield of 8.87 g (19.2%).

1. customThe penlane was then decanted from the dark colored insoluble layer
2. customEvaporation of the pentane
3. customgave the crude product which
4. customwas purified by flash-chromatography on silica gel eluting with penlane