反应详情

To a stirred anhydrous benzyl alcohol (10 ml) under nitrogen atmosphere at room temperature, was added sodium metal (285 mg, 12.41 mmol). After 1 hr., (7) (1.91 g, 5.17 mmol) in anhydrous benzyl alcohol (7 ml) was added. After stirring for overnight at room temperature, the mixture was evaporated in vacuo. The residue was dissolved in dichloromethane, filtered through a celite pad and the pad was washed with dichloromethane. The combined filtrate was then evaporated in vacuo and the residue was purified by silica gel column chromatography (eluent, EA:hexanes (1:10)) to afford 1.52 g (57%) of a colorless syrup; 1H NMR (200 MHz, CDCl3) δ 1.30 (6H, d, J=7.2 Hz), 2.39 (3H, s), 3.43 (1H, m), 4.02-4.13 (4H, m), 5.12 (2H, s), 5.42 (2H, s), 5.81 (1H, s), 6.92 (1H, s), 7.07 (1H, s), 7.16 (1H, s), 7.20-7.43 (10H, m).

1. customthe mixture was evaporated in vacuo
2. dissolutionThe residue was dissolved in dichloromethane
3. filtrationfiltered through a celite pad
4. washthe pad was washed with dichloromethane
5. customThe combined filtrate was then evaporated in vacuo
6. customthe residue was purified by silica gel column chromatography (eluent, EA:hexanes (1:10))