[CH3:1][C:2]1([CH3:10])[CH2:7][CH:6]([CH2:8]O)[CH2:5][CH2:4][O:3]1.C(Br)(Br)(Br)[Br:12].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.O>ClCCl>[Br:12][CH2:8][CH:6]1[CH2:5][CH2:4][O:3][C:2]([CH3:10])([CH3:1])[CH2:7]1
To a solution of (2,2-dimethyltetrahydro-2H-pyran-4-yl)methanol (2.50 g) in dichloromethane (30 mL) were added carbon tetrabromide (6.80 g) and triphenylphosphine (5.40 g), and the mixture was stirred at room temperature for 20 hr. Water was added and the mixture was extracted with diethyl ether. The extract was dried over anhydrous sodium sulfate and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (petroleum ether) to give the title compound (1.10 g) as a colorless oil.
Wird geladen…
