反应详情

To a solution of (3S,3aR,6S,6aR)-hexahydrofuro[3,2-b]furan-3,6-diol (0.57 g, 3.90 mmol) and 3,4-dihydro-2H-pyran (0.41 g, 4.88 mmol) in DCM (15 ml), toluene-4-solfonic acid monohydrate (0.0074 g, 0.039 mmol) was added and the mixture was stirred at room temperature for 3 hrs. Then the reaction mixture was washed with a saturated solution of NaHCO3 and brine. The organic extract was dried over sodium sulfate and the solvent, was evaporated under reduced pressure. The residue was purified by flash chromatography (Biotage SP1, EtOAc/n-hexane from 30 to 100%), affording the title product as a white solid.

1. washThen the reaction mixture was washed with a saturated solution of NaHCO3 and brine
2. extractionThe organic extract
3. dry with materialwas dried over sodium sulfate
4. customthe solvent, was evaporated under reduced pressure
5. customThe residue was purified by flash chromatography (Biotage SP1, EtOAc/n-hexane from 30 to 100%)