反应详情

Sodium methoxide (28% methanol solution, 3.43 g) was added at room temperature to a methanol (100 mL) solution of 4-cyclopropyl-2,3-difluorobenzaldehyde (2.16 g), and the mixture was stirred at 70 C for 15 hours in a nitrogen atmosphere. Water was added to the reaction mixture, and methanol was distilled off under reduced pressure. The residue was subjected to extraction with ethyl acetate. The obtained organic layer was washed with water and saturated saline in this order and dried over anhydrous magnesium sulfate, and then, the solvent was distilled off under reduced pressure. The obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate) to obtain the title compound (2.11 g)

1. distillationwas distilled off under reduced pressure
2. extractionThe residue was subjected to extraction with ethyl acetate
3. washThe obtained organic layer was washed with water and saturated saline in this order
4. dry with materialdried over anhydrous magnesium sulfate
5. distillationthe solvent was distilled off under reduced pressure
6. customThe obtained residue was purified by silica gel column chromatography (hexane/ethyl acetate)