反应详情

Diethyl malonate (32.0 g) was added to a solution of sodium ethoxide (1 equivalent) in ethanol and the solution was stirred for 30 min. 2-Bromoethyl ether (46.0 g) was then added and the mixture was stirred at reflux for 3 h. The mixture was then cooled, evaporated in vacuo and the residue partitioned between water and dichloromethane. The organic layer was separated and washed with water and brine, then dried (MgSO4) and evaporated. The residue was then purified by flash column chromatography on silica gel, eluting with 4:1 hexanes/ether, to give the title compound (28.0 g) as colourless liquid.

1. stirringthe mixture was stirred
2. temperatureat reflux for 3 h
3. temperatureThe mixture was then cooled
4. customevaporated in vacuo
5. customthe residue partitioned between water and dichloromethane
6. customThe organic layer was separated
7. washwashed with water and brine
8. dry with materialdried (MgSO4)
9. customevaporated
10. customThe residue was then purified by flash column chromatography on silica gel
11. washeluting with 4:1 hexanes/ether