反应详情

温度

0 °C

(E)-2-t-Butoxycarbonyl-7-phenylhept-2-enyl benzoate (5.9 g, 15 mmol) is dissolved in MeOH (75 mL) and cooled to 0° C. K2CO3 (2 g, 15 mmol) is added with stirring and the reaction is allowed to warm to 23° C. After 2 hours the reaction is neutralized with HOAc and the reaction is concentrated to approximately half of its volume. After diluting with ether (500 mL), the solution is washed with water (50 mL) and brine (50 mL). The resulting solution is dried (MgSO4) and concentrated in vacuo. The crude reaction mixture is purified by column chromatography (silica, 25% ether in petroleum ether) to give t-butyl (E)-2-hydroxymethyl-7-phenylhept-2-enoate (2.2 g, 51%): 1H NMR (300 MHz, CDCl3) δ 7.30-7.25 (m, 2H), 7.20-7.15 (m, 3H), 6.75 (t, J=7.7 Hz, 1H), 4.28 (d, J=6.8 Hz, 2H), 2.65-2.60 (m, 3H), 2.26 (q, J=7.5 Hz, 2H), 1.71-1.61 (m, 2H), 1.53-1.43 (m, 11H).

1. temperatureto warm to 23° C
2. concentrationthe reaction is concentrated to approximately half of its volume
3. additionAfter diluting with ether (500 mL)
4. washthe solution is washed with water (50 mL) and brine (50 mL)
5. dry with materialThe resulting solution is dried (MgSO4)
6. concentrationconcentrated in vacuo
7. customThe crude reaction mixture
8. customis purified by column chromatography (silica, 25% ether in petroleum ether)