反应详情

To a solution of 4-(3-(3-hydroxypropyl)phenyl)-2-methylbut-3-yn-2-ol (10) (0.750 g, 3.4 mmol) in toluene (50 mL) was added powdered KOH (0.390 g, 7 mmol). The resulting mixture was heated to reflux for 45 min, concentrated under reduced pressure to 10-15 mL and diluted with EtOAc (100 mL). The solution was washed with water (2×100 mL) and brine (50 mL), dried over MgSO4 and concentrated under reduced pressure. Purification by flash chromatography gave 3-(3-ethynylphenyl)propan-1-ol (11) as a light brown oil. Yield (0.272 g, 49%): 1H NMR (400 MHz, DMSO-d6) δ 7.24-7.32 (m, 4H), 4.49 (t, J=5.2 Hz, 1H), 4.15 (s, 1H), 3.39 (dt, J=6.4, 5.6 Hz, 2H), 2.60 (t, J=7.6 Hz, 2H), 1.66-1.73 (m, 2H).

1. temperatureThe resulting mixture was heated
2. temperatureto reflux for 45 min
3. concentrationconcentrated under reduced pressure to 10-15 mL
4. additiondiluted with EtOAc (100 mL)
5. washThe solution was washed with water (2×100 mL) and brine (50 mL)
6. dry with materialdried over MgSO4
7. concentrationconcentrated under reduced pressure
8. customPurification by flash chromatography