反应详情

To a solution (20 mL) of 6-fluoro-3-methyl-1-benzofuran-2-carbaldehyde (940 mg) synthesized above in tetrahydrofuran was added a 1.0M solution (7.92 mL) of cyclohexylmagnesium bromide in tetrahydrofuran at 0° C., and the mixture was stirred for 1 hr. Saturated aqueous ammonium chloride solution was added to quench the reaction, tetrahydrofuran was evaporated in an evaporator, and the residue was extracted with ethyl acetate. The extract was washed with saturated brine, dried over magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (15% ethyl acetate/hexane) to give the title object compound (931 mg, 67%) as a pale-yellow oil.

1. customto quench
2. customthe reaction, tetrahydrofuran
3. customwas evaporated in an evaporator
4. extractionthe residue was extracted with ethyl acetate
5. washThe extract was washed with saturated brine
6. dry with materialdried over magnesium sulfate
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by silica gel column chromatography (15% ethyl acetate/hexane)