反应详情

A solution of 11.0 g (0.041 mole) of 4-fluorophenylmethyl 3-fluoro-4-nitrophenyl ether in 100 mL of glacial acetic acid and 10 mL of water was heated to 50° C. To this hot solution was added 10.0 g (0.18 mole) of powdered iron. The reaction mixture was allowed to cool to ambient temperature, where it stirred for an additional hour. The reaction mixture was filtered through a bed of Celite® filter aid, and the Celite bed was washed in succession with ethyl acetate and 200 mL of water. The washes and the filtrate were combined, and the organic phase was separated. The organic phase was dried with anhydrous magnesium sulfate, filtered, and the solvent was evaporated under reduced pressure, leaving a dark oil as a residue. This oil was placed on a silica gel column and eluted with methylene chloride. The product-containing fractions were combined and the solvent evaporated under reduced pressure, leaving 6.8 g of 4-fluorophenylmethyl 4-amino-3-fluorophenyl ether as a solid, m.p. 42°-43° C.

1. filtrationThe reaction mixture was filtered through a bed of Celite®
2. filtrationfilter aid
3. washthe Celite bed was washed in succession with ethyl acetate and 200 mL of water
4. customthe organic phase was separated
5. dry with materialThe organic phase was dried with anhydrous magnesium sulfate
6. filtrationfiltered
7. customthe solvent was evaporated under reduced pressure
8. customleaving a dark oil as a residue
9. washeluted with methylene chloride
10. customthe solvent evaporated under reduced pressure