反应详情

温度

0 °C

An oven-dried 100 mL round bottom flask was charged with t-BuOK (13 mmol), dry THF (30 mL), purged with argon and cooled to 0° C. in an ice bath. Tetraethyleneglycol monomethyl ether (10 mmol) was then added dropwise to the solution and the reaction stirred at 0° C. for 1 h under argon. Allyl bromide (13 mmol) was added dropwise, and the solution was warmed to R.T. and allowed to stir for 24 h under argon. Deionized water (2 mL) was then added and the reaction stirred for 10 min. All liquid were then removed in vacuo and the residue redissolved in ethyl acetate (50 mL). The organic was washed three times with water (20 mL), dried over Na2SO4, filtered over Celite and then concentrated in vacuo to yield clear/light yellow oil (47%). 1HNMR (400 MHz, CDCl3): δ=5.90 (m, 1H), 5.23 (dd, 1H, 3JHHtrans=17.3 Hz, 2JHHgem=1.7 Hz), 5.15 (dd, 1H, 3JHH=10.4 Hz, 2JHHgem=1.5 Hz), 4.00 (dd, 2H, 3JHH=5.89 Hz, 4JHH=1.5 Hz), 3.65 (m, 12H), 3.59 (m, 2H), 3.53 (m, 2H), 3.36 (s 3H) ppm. 13CNMR (400 MHz, CDCl3): δ=134.8, 117.0, 72.2, 71.9, 70.6, 70.6, 70.6, 70.5, 69.4, 59.0 ppm. HRMS-ESI: Calculated [M+Na]+: 271.1516. found: 271.1516.

1. custompurged with argon
2. temperaturethe solution was warmed to R.T.
3. stirringto stir for 24 h under argon
4. stirringthe reaction stirred for 10 min
5. customAll liquid were then removed in vacuo
6. dissolutionthe residue redissolved in ethyl acetate (50 mL)
7. washThe organic was washed three times with water (20 mL)
8. dry with materialdried over Na2SO4
9. filtrationfiltered over Celite
10. concentrationconcentrated in vacuo