反应详情

温度

100 °C

To a mixture of 40.0 g (134 mmol) of 3,7,11,15-tetramethyl-1-hexadecanol and 400 mL of 48% hydrobromic acid was slowly added 40 mL of concentrated sulfuric acid. The reaction mixture was heated at 100° C. for 24 h and poured into 1.2 L of water. The mixture was extracted with hexanes, and the combined organic phases were washed with saturated aqueous NaHCO3 and dried over MgSO4. The solution was concentrated to a dark liquid, which was eluted through 3 inches (7.6 cm) of silica with hexanes. Concentration of the eluent yielded a light amber liquid, and bulb-to-bulb distillation gave 40.8 g (84%) of 1-bromo-3,7,11,15-tetramethylhexadecane as a clear, colorless liquid, bp 160-180° C. at 0.06 mm Hg.

1. extractionThe mixture was extracted with hexanes
2. washthe combined organic phases were washed with saturated aqueous NaHCO3
3. dry with materialdried over MgSO4
4. concentrationThe solution was concentrated to a dark liquid, which
5. washwas eluted through 3 inches (7.6 cm) of silica with hexanes
6. customConcentration of the eluent yielded
7. distillationa light amber liquid, and bulb-to-bulb distillation