反应详情

A solution of sodium ethoxide (21% in EtOH, 0.32 gm, 4.76 mmol) was added to a mixture of 1-(pentafluorophenyl)-1-ethanone (5.91 gm, 47.6 mmol, Aldrich) and 4-fluorobenzaldehyde (10.00 gm, 47.6 mmol) stirring in ethanol (100 ml) under argon. The solution was allowed to stir at room temperature for 18 hours, then EtOH was evaporated to afford a yellowish, oily solid. The solid was redissolved in ether, washed with water and brine, then dried over MgSO4, filtered and concentrated to give a yellow residue. The residue was purified by flash chromatography on Merck silica gel in 5% EtOAc/hexane. Fractions containing the product were combined and concentrated to a yellow solid. The solid was recrystallized from hexane to afford the title compound as large yellow crystals (8.220 gm, 52%).

1. customEtOH was evaporated
2. customto afford a yellowish, oily solid
3. washwashed with water and brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated
7. customto give a yellow residue
8. customThe residue was purified by flash chromatography on Merck silica gel in 5% EtOAc/hexane
9. additionFractions containing the product
10. concentrationconcentrated to a yellow solid
11. customThe solid was recrystallized from hexane