反应详情

To a solution of 2-isopropylphenol (12) (2.0 g, 14.6 mmol) in 15 ml of Et2O at 0° C. was added dioxane dibromide (3.62 g, 14.6 mmol, 1 eqv). The, solution was allowed to stir for 30 min at rt. The reaction mixture was washed with sat. NaCl and 10% NaHCO3. The Et2O phase was concentrated in vacuo and then vacuum distilled (142-145° C., 20 mm Hg) to yield 2.07 g of a clear oil (66%) which solidified upon standing: 1H NMR (500 MHz, CDCl3) δ 1.23 (d, J=3.7 Hz, 6H), 3.16 (m, 1H), 4.84 (s, 1H), 6.61 (d, J=8.6 Hz, 1H), 7.15 (d, J=11.0 Hz, 1H), 7.28 (s, 1H); 13C NMR (125 MHz, CDCl3) δ 22.33, 27.17, 113.24, 116.99, 129.34, 129.50, 136.91, 151.81; LRMS (EI) (M+, 214/216).

1. washThe reaction mixture was washed with sat. NaCl and 10% NaHCO3
2. concentrationThe Et2O phase was concentrated in vacuo
3. distillationvacuum distilled (142-145° C., 20 mm Hg)