反应详情

温度

75 °C

To a solution of 1.0 g of 4-oxo-6-((tetrahydro-2H-pyran-2-yloxy)methyl)-4H-pyran-3-yl trifluoromethanesulfonate in 10 mL of dioxane, 1.2 g of potassium carbonate, 0.4 mL of trimethylboroxin and 0.33 g of tetrakis(triphenylphosphine)palladium(0) were added, and the mixture was stirred at 70 to 80° C. for 2 hours under an argon atmosphere. After cooling to room temperature, water and ethyl acetate were added to the reaction mixture, and the organic layer was separated. The aqueous layer was extracted with ethyl acetate, the organic layer and the extract were combined, the resultant solution was dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The resultant residue was purified by silica gel column chromatography using an eluent of hexane:ethyl acetate=1:1 to obtain 0.62 g of 5-methyl-2-((tetrahydro-2H-pyran-2-yloxy)methyl)-4H-pyran-4-one as a brown oily substance.

1. temperatureAfter cooling to room temperature
2. customthe organic layer was separated
3. extractionThe aqueous layer was extracted with ethyl acetate
4. dry with materialthe resultant solution was dried over anhydrous magnesium sulfate
5. distillationthe solvent was distilled off under reduced pressure
6. customThe resultant residue was purified by silica gel column chromatography