反应详情

温度

70 °C

A mixture of (1-(3-phenoxyphenyl)-2-oxabicyclo[2.2.2]octan-4-yl)methyl 4-methylbenzenesulfonate (0.1 g, 0.215 mmol) and sodium acetate (0.212 g, 2.58 mmol) in DMSO (5 mL) was stirred at 70° C. in a seal tube for 3 days. The reaction was diluted with EtOAc (5 mL) and washed with water (3×5 mL). The organic layer was dried over MgSO4, filtered, and concentrated in vacuo to give (1-(3-phenoxyphenyl)-2-oxabicyclo[2.2.2]octan-4-yl)methyl acetate. The mixture of the above acetate (0.076 g, 0.216 mmol) and 1 M NaOH (0.65 mL, 0.647 mmol) in THF/MeOH (1:1 of a 2 mL solution) was stirred at rt for 18 h. The reaction was diluted with EtOAc (5 mL) and washed with water (3×5 mL). The organic layer was dried over MgSO4, filtered, and concentrated in vacuo. The crude oil was purified by flash chromatography on SiO2 (0 to 50% EtOAc:hexanes) to afford the title compound (0.05 g, 75% yield) as a clear oil. 1H NMR (500 MHz, CDCl3) δ 7.39-7.26 (m, 3H), 7.21-7.14 (m, 2H), 7.14-7.08 (m, 1H), 7.05-7.00 (m, 2H), 6.88 (ddd, J=8.1, 2.5, 1.0 Hz, 1H), 3.99-3.89 (m, 2H), 3.38 (s, 2H), 2.16-2.00 (m, 4H), 1.84-1.71 (m, 3H), 1.71-1.57 (m, 2H).

1. washwashed with water (3×5 mL)
2. dry with materialThe organic layer was dried over MgSO4
3. filtrationfiltered
4. concentrationconcentrated in vacuo