反应详情

A solution of 2-[2,5-bis(benzyloxy)phenoxy]-1-phenylethanol (3.9 g) in ethanol (175 ml) was hydrogenated in the presence of 10% palladium on charcoal (100 mg) at 30 psi. The catalyst was removed by filtration and the solvent was evaporated under reduced pressure. The residue was recrystallized from the mixture of toluene-ethyl acetate 8:1 (15 ml). The yield of 2-(2-Hydroxy-2-phenylethoxy)-benzene-1,4-diol is 1.2 g. 1H NMR (DMSO-d6) δ=3.79 (dd, J=9.6, 8.3 Hz, 1H), 4.00 (dd, J=9.6, 3.6 Hz, 1H), 4.94 (ddd, J=3.6, 8.3, 3.9 Hz, 1H), 5.66 (d, J=3.9 Hz, 1H), 6.18 (dd, J=8.5, 2.3 Hz, 1H), 6.34 (d, J=2.3, 1H), 6.57 (d, J=8.5, 1H), 7.26-7.47 (m, 5H), 7.97 (s, 1H), 8.66 (s, 1H).

1. customThe catalyst was removed by filtration
2. customthe solvent was evaporated under reduced pressure
3. customThe residue was recrystallized from the mixture of toluene-ethyl acetate 8:1 (15 ml)