Cyclobutanone → 1-(2,3-Difluoro-6-methoxyphenyl)-1-cyclobutanol

Beteiligte Stoffe

Reaktionsschritte

To a solution of 3,4-difluoroanisole (2.47 g) in tetrahydrofuran (50 mL) was added n-butyllithium (2.64 mol/L n-hexane solution, 6.5 mL) at −78° C., and the mixture was stirred at the same temperature for 30 minutes. To the reaction mixture was added a solution of cyclobutanone (1 g) in tetrahydrofuran (20 mL), and the mixture was stirred at the same temperature for 30 minutes. To the reaction mixture was added a saturated aqueous ammonium chloride solution, and the resulting mixture was extracted with diethyl ether. The extract was washed with water and brine successively, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure, and the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=5/1) to give the title compound (2.69 g).

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