1-Bromo-4-fluorobenzene → (2,4-Dimethylphenyl)(4-fluorophenyl)methanol

Participants

Reaction Steps

Under a nitrogen atmosphere, turnings of magnesium (16.8 g) were dispersed in THF (46 ml), and iodine (0.1 g) was added. Then, 4-bromofluorobenzene (2.1 g) was added dropwise. After confirmation of the start of the reaction, THF (242 ml) was flown in. 4-Bromofluorobenzene (113.9 g) was added dropwise at 31.8–48.9° C., and the mixture was stirred at 38–40° C. for 2 hr. The obtained mixture with a Grignard reagent was cooled and thereto was added dropwise 2,4-dimethylbenzaldehyde (81 g) at 5–29.9° C. After the dropwise addition, the reaction mixture was stirred at 21.3–28.3° C. for 1.5 hr. A saturated aqueous ammonium chloride solution was added to stop the reaction. The reaction mixture was partitioned and the obtained organic layer was washed with saturated brine. The solvent was evaporated from the organic layer under reduced pressure to give (2,4-dimethylphenyl)-(4′-fluorophenyl)methanol (139.2 g, 100%) as a colorless oil. The obtained colorless oil was measured for 1H-NMR and found to be the same as in Example 1.

Provenance & Evidence