反应详情

温度

60 °C

(R)-3-(4-Bromo-3,5-dimethylphenoxy)tetrahydrofuran 35a (2.27 g, 8.37 mmol), N-bromosuccinimide (1.79 g, 10.04 mmol) and azobisisobutyronitrile (64 mg, 0.42 mmol) were dissolved in 50 mL of carbon tetrachloride. The reaction solution was heated to 60° C. and stirred for 12 hours. The resulting solution was concentrated under reduced pressure, mixed with 50 mL of tert-butyl methyl ether, stirred for 10 minutes, filtered and washed with tert-butyl methyl ether (20 mL×2). The combined filtrate was concentrated under reduced pressure and the residue was purified by silica gel column chromatography with elution system B to obtain the title compound (R)-3-(4-bromo-3-(bromomethyl)-5-methylphenoxy)tetrahydrofuran 35b (707 mg, yield 24.2%) as a light yellow solid.

1. concentrationThe resulting solution was concentrated under reduced pressure
2. additionmixed with 50 mL of tert-butyl methyl ether
3. stirringstirred for 10 minutes
4. filtrationfiltered
5. washwashed with tert-butyl methyl ether (20 mL×2)
6. concentrationThe combined filtrate was concentrated under reduced pressure
7. customthe residue was purified by silica gel column chromatography with elution system B