反应详情

A 60% dispersion of NaH/mineral oil (144 mg, 3.6 mmol) under Ar was added dropwise to a stirred solution of phenol (284 mg, 3 mmol) in PhMe (15 mL). After 10 min, p-ethylbenzyl chloride (1.23 g, 5.3 mmol) in PhMe (2 mL) was added prior to heating the reaction for 6 hr at 80°. After cooling, the volatiles were removed using a rotary evaporator and the residue dissolved in 15 mL of MeOH. The MeOH solution was extracted 4× with hexane prior to concentration. The resulting residue was dissolved in 1:1 EtOAc/H2O (100 mL), the pH adjusted to 5 and the two phases separated. After drying over Na2SO4 and removal of the EtOAc, 390 mg of crude title 2-(4′-ethylbenzyl)phenol was obtained. Prep HPLC yielded 275 mg of clean 2-(4′-ethylbenzyl)phenol.

1. temperatureto heating
2. customthe reaction for 6 hr at 80°
3. temperatureAfter cooling
4. customthe volatiles were removed
5. customa rotary evaporator
6. dissolutionthe residue dissolved in 15 mL of MeOH
7. extractionThe MeOH solution was extracted 4× with hexane
8. concentrationto concentration
9. dissolutionThe resulting residue was dissolved in 1:1 EtOAc/H2O (100 mL)
10. customthe two phases separated
11. dry with materialAfter drying over Na2SO4 and removal of the EtOAc