反应详情

Freshly prepared silver oxide (34.8 g, 0.15 mol) was added to a mixture of 3-methyl-2-buten-1-ol (21.0 g, 25 mL, 0.24 mol) and 5-nitro-2-furfuryl bromide (18.8 g, 0.1 mol) and stirred at room temperature for 12 h. Silver salts were removed by filtration and the filter cake was washed with ether (200 mL). The filtrate and the washings were combined and evaporated to remove ether and excess 3-methyl-2-buten-1-ol. The oil obtained was purified by column chromatography (silica gel, hexane:ethyl acetate, 7:1). Fractions containing the product were collected and evaporated to give a light yellow oil. Yield 5.5 g. 1H NMR (CDCl3) ε 1.69 and 1.77 (s, 6H, CH3), 4.09 [d, 2H, (CH3)2C=CHCH2 --OCH2)], 4.64 [s, 2H, (CH3)2C=CHCH2 --OCH2)], 5.38 (t, 1H, (CH3)2C=CH--), 6.6 and 7.27 (d, 2H, ArH).

1. customSilver salts were removed by filtration
2. washthe filter cake was washed with ether (200 mL)
3. customevaporated
4. customto remove ether and excess 3-methyl-2-buten-1-ol
5. customThe oil obtained
6. customwas purified by column chromatography (silica gel, hexane:ethyl acetate, 7:1)
7. additionFractions containing the product
8. customwere collected
9. customevaporated
10. customto give a light yellow oil