反应详情

温度

80 °C

A stirred mixture of tosylate (35b) (20 mg, 0.05 mmol), ethanol (1 mL) and sodium ethoxide solution in ethanol (21% wt, 94 μL, 0.25 mmol) was heated under an atmosphere of argon at 80° C. for 16 hours. The mixture was diluted with aqueous saturated sodium hydrogen carbonate solution (10 mL) then extracted with tert-butyl methyl ether (3×5 mL). The organic phase was dried (MgSO4), filtered and reduced in vacuo to leave an oil. Flash chromatography over silica, eluting with diethyl ether:pentane mixtures 65:35 to 83:17 gave ethoxyalcohol (59) as a pale yellow solid (1 mg, 7%). TLC (Rf=0.50, Et2O); analytical HPLC main peak, Rt=15.35 min., HPLC-MS 218.1 [M+2H−tBu]+, 296.1 [M+Na]+, 569.3 [2M+Na]+.

1. extractionthen extracted with tert-butyl methyl ether (3×5 mL)
2. dry with materialThe organic phase was dried (MgSO4)
3. filtrationfiltered
4. customto leave an oil
5. washFlash chromatography over silica, eluting with diethyl ether