反应详情

After dissolving N-cyclopropylmethyl-N-[2-ethyl-7-(2-methoxy-4,6-dimethylphenyl)pyrazolo[1,5-a]pyridin-3-yl]amine (255 mg) in tetrahydrofuran (2 mL), tetrahydro-2H-4-pyrancarbaldehyde (173 mg) [CAS No.50675-18-8] and sodium triacetoxyborohydride (241 mg) were added, and the mixture was stirred at room temperature for 1 hour. Saturated aqueous sodium hydrogencarbonate was added to the reaction mixture, extraction was performed with ethyl acetate, and the extract was washed with brine. After drying over anhydrous magnesium sulfate and filtration, the solvent was concentrated under reduced pressure, the residue was purified by silica gel column chromatography, and the title compound (134 mg) was obtained from the n-hexane:ethyl acetate (5:1) fraction as a yellow oil.

1. washthe extract was washed with brine
2. dry with materialAfter drying over anhydrous magnesium sulfate and filtration
3. concentrationthe solvent was concentrated under reduced pressure
4. customthe residue was purified by silica gel column chromatography